Would you elaborate on your last thought? It is currently a valid tactic, that you don't kill the healer because he won't attack you. I can't really understand: is it a problem, is it not, or is it maybe a too-long process?
Viewing post in Tower of decadence jam comments
As you mentioned its a long process where the player would try to heal themselves at every room since even with an attacking enemy, you can still out-heal their damage. so maybe have a limit on heals and mana per room or simply recover the player at the end of the round (since this is near equivalent to the end outcome of this strat). But still this is just my opinion, feel free to ignore it or use it and all the best for your game dev journey!