Haha, that reminds me of the quote "Given the opportunity, players will optimize the fun out of a game".
That being said, I think trying to find the OP strats is actually kinda part of the fun. The balance of this initial version of the game is definitely "good enough" and there are plenty of OP strats to find :) . That being said, I think keeping your barbarian with the base HP and keeping a cursed key and amulet(s?) on them is probably a better strat than pairing it with a quick healer. Barbarian does 150% damage at 1 hp which is probably very overtuned haha. The next highest is 80% damage on the paladin which is still ridiculously high.
The balancing will be better in the next version for sure, but for now I'm glad you had a good time trying to optimize the fun out of the game :) . Thanks for playing and leaving a comment :D .