Personally I think warlock fits better for flavor like for instance you're one of the defenders classes and it's like a story "PLOT TWIST, THE WARLOCK DID HAVE RENO!" plus plot twists are before the climax of a story and typically have something to do with the villain or driving force of it and since warlock has the main villain as their legendary i'd say it's quite perfect
Personally I think warlock fits better for flavor like for instance you're one of the defenders classes and it's like a story "PLOT TWIST, THE WARLOCK DID HAVE RENO!" plus plot twists are before the climax of a story and typically have something to do with the villain or driving force of it and since warlock has the main villain as their legendary i'd say it's quite perfect