Yea, it needs work. Class balance seems super off in a lot of ways. The biggest offender is that I'm not sure you can actually run a party without having a priest, as there is just no other available source of healing you can really use. I tried running with the cthulu cultist dudes using the 0-10 heal, but it's just too random and bleeds stack so it'll eventually just kill you.
Right now I've got 4 priests of varying levels I have to keep sane because without them you just can't complete anything.
Still can't find a use for plague doctors or jesters. Plagues have an okay stun, but the targeting is limited and gets fucked up by the fat mobs, and later on stuff boasts such big resists anyway that you're almost always better off just going for permanent removal (damage).