So...when last I tried, these mods didn't work terribly well together. However at the moment, I'm running around the Island with Naturalism's Fantasy Shapes first, and Annunaki second. I've been running around for about twenty minutes, and so far it looks like they're playing relatively nicely.

I'm a butt naked freak of nature, and there are Annunaki creatures spawning. However, I have no idea if Naturalism will do anything to interfere with other functions of Annunaki, nor do I have any idea if these will cause routine crashes.

I'm using both of these on our server, and 0 issues with them.