Because Warcraft Rumble is an adaptive collectible-based mobile game, there is no single best build for PvP. Games of this type feature ever-changing chemistry between characters and counters to each of them. That way, the game is constantly challenging, and no single best deck build can cheese your way to the finish line. That being said, there will always be some synergies between minis that stand out from the competition and are too good to pass up when constructing your PvP deck.