That certainly sounds like an interesting combination of cards to work with! I understand the idea you are aiming for, but the execution of the deck (i.e. what cards you use, your deck's game plan, your deck's win condition, etc.) highly depends on what your goal of the deck is.
If your goal is to use Cleric and Acolyte of Pain to cycle through your deck while also having synergy with Wild Pyromancer, that is a tried and true combo/synergy. However, it has grown to be a little too slow for Wild to be your main tool to get your win condition. But if you simply have them to for the synergy/flavor of "Healing/Pain," I respect that and they can work well together to help you get to your desired cards.
On the other hand, if you choose an AoE style with deathrattle minions, it might be worth adding in Awaken the Makers+Twilight's Call to allow you to survive longer and stabilize until you draw your C'Thun. Quest Priest is very competitive, and some of the cards run in Quest Priest have synergy with your "healing/damage" flavor (e.g. Explosive Sheep, Spirit Lash), so it might not actually be too hard to manipulate Quest Priest to have a C'Thun win condition.
It sounds like a tricky idea to work around, so I think it is best to focus on building the deck around what makes those cards most fun for you (whether it be the flavor, the "healing/damage" synergy, buffing C'Thun to be huge, the massive board swing turns, etc.).
In general, I find a card, synergy, "flavor," or strategy that I find particularly enjoyable (and often underplayed or very situational), and then I experiment until I find something that enables me to fully enjoy that element. Sometimes there is a single card that drives me to make a deck, and other times it's simply a mechanic or synergy that I particularly enjoy. Most importantly, I usually focus on the "fun" elements over the competitive elements, and often I end up creating a better deck by viewing it that way because, in order to make a deck fun, it usually has to be successful.
For example, I really enjoy the card art, flavor, and effect of Archwitch Willow, so I spent a lot of time experimenting with decks that allowed me to actually experience her in game. Once I found a list that finally felt good to play, I created a guide for the list, and other people seemed to enjoy it too!
Another example is with this deck I created (which is one of my favorite decks I've created). I really like the idea of deathrattle Rogue, and I really liked the idea of using the relatively new Cursed Vagrant in a "Big Deathrattle Rogue" archetype. Additionally, I have a special affinity towards alchemy-oriented cards (as you can tell by my profile picture), and I REALLY liked Necrium Apothecary when it was first released, but its nerf sent it to the shadow realm; so I decided I wanted to put both of those cards together and revive/create a new playstyle for Rogue. Obviously Rogue doesn't have great tools to allow it to play big/late-game decks in standard, but one tool it does have that I think is really underutilized is Bazaar Burglary--in fact, that quest is one of my favorite quests from Saviors of Uldum, so I am always looking for a way create a tempo/control Rogue using the quest. Putting everything together, I ended up combining two mechanics/ideas that I really enjoy in a list that is deceptively strong in my opinion.
As a final example, if you check out one of my first deck creations for this site, Magic Giant Token Rogue, you can see another "deck concoction" that combines cards I really enjoy with mechanics I find fun all while prioritizing "bad" and rarely played cards (the holy trinity for me LOL). More importantly, because it was one of my first guides, I created a little write up at the end explaining how I ended up with such a deck concoction; so, if you are interested in seeing a very specific take of how I came up with one of my unique lists, that guide has a really in-depth overview of my thought processes.
Cheaty Anklebiter definitely has a lot of synergy with this deck that I may have overlooked. Cheaty Anklebiter could definitely provide some early game board control and/or health manipulation to cheat out Flesh Giant faster. Furthermore, it could be used in tandem with Brittlebone Destroyer as another activator that doesn't consume health while being low cost.
However, in my experience, Even Warlock almost always wants to Life Tap for the first 3 turns to keep our hand full to drop Mountain Giant ASAP. Additionally, the deck needs big healing bursts to compensate for the incremental life drain constantly persisting from our cards and hero power, so the 1-3 lifesteal gained from Cheaty Anklebiter probably isn't impactful enough. It also has some anti-synergy with Raise Dead--we want to be getting giants back, not 2-drops. I think Cheaty Anklebiter works better for the Pain archetype more than the Even archetype--Pain wants to cheat out lots of minions fast whereas Even wants to cheat out big minions with consistency.
Restoring health was my main focus for the Lifedrinker slot. Originally, I ran Shroom Brewer, but the 1 extra healing and additional 1/1 in stats didn't provide enough tempo. Most lists don't even bother to add in the extra healing and instead run Faceless Shambler for the extra body, but I found the extra health more impactful. Ultimately, I went with Lifedrinker because the deck needed more burst healing in my experience (not more health manipulation or board control), and the burn damage allowed me to get wins I otherwise couldn't with such a minion based deck--two Lifedrinkers and a Darkbomb on turn 10 can deal 9 damage to our opponent's face which is something most decks don't have the ability to play around and almost never expect from Even Warlock.
It is cheaper!
Seems like a meme, but maybe it will turn into some cool control tool.
Good news for you; they are allowing Arena tickets to be used on Duels!
That certainly sounds like an interesting combination of cards to work with! I understand the idea you are aiming for, but the execution of the deck (i.e. what cards you use, your deck's game plan, your deck's win condition, etc.) highly depends on what your goal of the deck is.
For example, if your goal is to make the biggest C'Thun possible (with a focus on abusing Hooded Acolyte and Crazed Worshipper), then I would probably focus on cards that enable AoE damage and health restore to all minions (e.g. Wild Pyromancer+Circle of Healing/Divine Hymn/Holy Nova, Tentacle of N'Zoth/Explosive Sheep/Unstable Ghoul+Potion Vendor/Holy Ripple).
If your goal is to use Cleric and Acolyte of Pain to cycle through your deck while also having synergy with Wild Pyromancer, that is a tried and true combo/synergy. However, it has grown to be a little too slow for Wild to be your main tool to get your win condition. But if you simply have them to for the synergy/flavor of "Healing/Pain," I respect that and they can work well together to help you get to your desired cards.
On the other hand, if you choose an AoE style with deathrattle minions, it might be worth adding in Awaken the Makers+Twilight's Call to allow you to survive longer and stabilize until you draw your C'Thun. Quest Priest is very competitive, and some of the cards run in Quest Priest have synergy with your "healing/damage" flavor (e.g. Explosive Sheep, Spirit Lash), so it might not actually be too hard to manipulate Quest Priest to have a C'Thun win condition.
It sounds like a tricky idea to work around, so I think it is best to focus on building the deck around what makes those cards most fun for you (whether it be the flavor, the "healing/damage" synergy, buffing C'Thun to be huge, the massive board swing turns, etc.).
In general, I find a card, synergy, "flavor," or strategy that I find particularly enjoyable (and often underplayed or very situational), and then I experiment until I find something that enables me to fully enjoy that element. Sometimes there is a single card that drives me to make a deck, and other times it's simply a mechanic or synergy that I particularly enjoy. Most importantly, I usually focus on the "fun" elements over the competitive elements, and often I end up creating a better deck by viewing it that way because, in order to make a deck fun, it usually has to be successful.
For example, I really enjoy the card art, flavor, and effect of Archwitch Willow, so I spent a lot of time experimenting with decks that allowed me to actually experience her in game. Once I found a list that finally felt good to play, I created a guide for the list, and other people seemed to enjoy it too!
Another example is with this deck I created (which is one of my favorite decks I've created). I really like the idea of deathrattle Rogue, and I really liked the idea of using the relatively new Cursed Vagrant in a "Big Deathrattle Rogue" archetype. Additionally, I have a special affinity towards alchemy-oriented cards (as you can tell by my profile picture), and I REALLY liked Necrium Apothecary when it was first released, but its nerf sent it to the shadow realm; so I decided I wanted to put both of those cards together and revive/create a new playstyle for Rogue. Obviously Rogue doesn't have great tools to allow it to play big/late-game decks in standard, but one tool it does have that I think is really underutilized is Bazaar Burglary--in fact, that quest is one of my favorite quests from Saviors of Uldum, so I am always looking for a way create a tempo/control Rogue using the quest. Putting everything together, I ended up combining two mechanics/ideas that I really enjoy in a list that is deceptively strong in my opinion.
As a final example, if you check out one of my first deck creations for this site, Magic Giant Token Rogue, you can see another "deck concoction" that combines cards I really enjoy with mechanics I find fun all while prioritizing "bad" and rarely played cards (the holy trinity for me LOL). More importantly, because it was one of my first guides, I created a little write up at the end explaining how I ended up with such a deck concoction; so, if you are interested in seeing a very specific take of how I came up with one of my unique lists, that guide has a really in-depth overview of my thought processes.
Cheaty Anklebiter definitely has a lot of synergy with this deck that I may have overlooked. Cheaty Anklebiter could definitely provide some early game board control and/or health manipulation to cheat out Flesh Giant faster. Furthermore, it could be used in tandem with Brittlebone Destroyer as another activator that doesn't consume health while being low cost.
However, in my experience, Even Warlock almost always wants to Life Tap for the first 3 turns to keep our hand full to drop Mountain Giant ASAP. Additionally, the deck needs big healing bursts to compensate for the incremental life drain constantly persisting from our cards and hero power, so the 1-3 lifesteal gained from Cheaty Anklebiter probably isn't impactful enough. It also has some anti-synergy with Raise Dead--we want to be getting giants back, not 2-drops. I think Cheaty Anklebiter works better for the Pain archetype more than the Even archetype--Pain wants to cheat out lots of minions fast whereas Even wants to cheat out big minions with consistency.
Restoring health was my main focus for the Lifedrinker slot. Originally, I ran Shroom Brewer, but the 1 extra healing and additional 1/1 in stats didn't provide enough tempo. Most lists don't even bother to add in the extra healing and instead run Faceless Shambler for the extra body, but I found the extra health more impactful. Ultimately, I went with Lifedrinker because the deck needed more burst healing in my experience (not more health manipulation or board control), and the burn damage allowed me to get wins I otherwise couldn't with such a minion based deck--two Lifedrinkers and a Darkbomb on turn 10 can deal 9 damage to our opponent's face which is something most decks don't have the ability to play around and almost never expect from Even Warlock.
I am excited to see the buffs to Totem Goliath and Archwitch Willow!
I don't think the changes are going to be strong enough for either to be competitive, but they will be fun to try out nonetheless.
Amazing skin--really channeling Thor, and it looks great.
This felt way too cartoon-y for a hero portrait originally, but I've grown to like it since first released.
I was always envious of this skin, until Mis Lazul was released.
Hello, hello, hello!
Malfurion 2.0
I didn't love this upon first release, but it has since grown to be one of my favorite 1000-win portraits.
The second best reward to receive in Hearthstone--obviously right behind the Dungeon Run cardback from Kobolds and Catacombs.
Love her and her Bog Creeper!
<Inconceivable!>
Love his purple fireball, hate this portrait's aesthetic.
JARAXXUS ONLINE!
I'll always be bitter that my Quest for her got glitched, and I was too ignorant at the time to get it fixed, so I'll never have her...
Even though Corrupt Garrosh is awesome, the animation for Magni's hero power is too good.