Don't know if this has been covered before, but I'm betting it hasn't been.
So the new kid on the block is Nemesis. And it has badass mods like CGO, TUDM, MBO and others. But it doesn't support creatures! And FNIS and Nemesis hate each other almost as much as Fore and Shiro do! Whatever can I do?
Fear not! The answer is here.
The only caveat is that often Nemesis will not update or launch after you have run FNIS once. This is because both FNIS and Nemesis *modify existing files* before creating any new ones in overwrite. Your FNIS + Nemesis runs have fucked up the behavior files of your Nemesis animation mods like CGO.
*Reinstall all of those, clear Nemesis output, and rerun Nemesis.* This should solve your problem. As always, be sure to reseat the dummy FNIS.esp near the top of your LO (just below SKY_UI) as the MNC load order instructions recommend.