I recommend the occultist for an abomination group, not only as a healer, but also because, on medium and long quests, he has a +20% DMG buff that he can use for the abomination.

The vestal and flagellant are obviously out because both are religious, so that leaves the occultist as a strong healer (with the arballest, plague doctor and antiquarian as possible options for secondary healers).

Either the jester or houndmaster would work for this, but the houndmaster might work a little better because his stress heal targets the whole party and he's, IMO, a stronger class overall compared to the jester. Because the abomination also stress out the rest of the party when transforming, it's a good idea to have a stress healer for the rest of the party. There are three stress healer's available to the abomination: the houndmaster, the jester, and the abomination himself. Remember that religious characters can't team up with the abomination, so crusader won't work in this case. Originally posted by Valmar:I agree, I use this when I can, or with other tank (Crusader can also stress relief).

Nexus darkest dungeon abomination