I've been having this issue where spriggans and flame atronachs or other flame atronach-ish creatures from others mods won't move and just stand there in a T pose.

I've rerun FNIS dozens of times, I used the creature pack and without the creature pack. It just seemed out of the blue about a month or so ago they just stopped moving.

Some people recommended increasing the Actor Ai number and combat actor number, but that didn't do anything either.

Here is my mod/loadorder list http://modwat.ch/Dagerocco#/plugins

Any help from anyone would be greatly appreciated.

Have you verified the integrity of your local files through Steam? If you haven't, try doing that, then re-run the FNIS generator tool.

What options are you picking in the FNIS generator tool. You might be missing a selection if the mod needs. You might also need to check if the mod needs some other mod for it to work.