Shroomy
Adventurer
The damage resistance part of it is still there, although baked into the stats so it's not so noticeable (and a lot of demons have that anyway, though few low-level ones do). Adding 1d6 acid damage for grapplers or natural weapon attacks is a simple thing to do. The dissolving weapons power would be a bit tougher to add however.
I did find it odd that after having a picture of a slime-dripping babau that the slime wasn't even mentioned, even as flavor, though...
If I ever use a Babau in a home game I'll probably add that ability, just like I'm going to give magic jar to my shadow demons.
Sent from my iPhone using Tapatalk