Thx to all the additional comments!

@TheDuck - I did made some points about the plague. I'll try to elaborate more on it if it is more helpful.

@Silver Rusher - Many Folks at the Colosseum point to the Protectorate system as bugged. I personally haven't tried it yet seeing no strategic advantage to it. We'll see if it is useful when patch 1.2 comes out

@Ellesthyan - Yes. I've already formulated the equation for Devastation Values here. I'll include it in the next update.

Also, I'll try to work your fort argument into the next update. My main gripe with forts is though is the unit upkeep. Enemy armies can be easily blocked by your main forces with the help of scout agents.