Thinking of a power system to stop god modding but it will be lax (so not extremely strict) just a idea.

Maybe ranks like this

God. Very exceptional rank only 3 entites hold it. And they must fall into one of 3 criteria
Ancient Slender/observer etc very powerful beings that generally an`t messed with 
Supernatural powerful beings that have supernatural abiltys like telepathy and telekinsis and teleporting etc
Enchanced Humans with enhanced physical or mental capabiltys
Human.. obvious