Here, I found out why AI is nigh untouchable by monsters.
This happened last night where monsters was hyperaggressive for some reason, abandoning lairs to murder a hero or stuff, I was attacked so much.. way more than usual. It felt like monsters was out for blood for the first time after over 100 hours playing this game, I've had a ravenous spider army chase my low lvl army for like 20+ turns until I managed to kill enough low level armies to smash it with my healer when it stocked up enough mana. I actually felt like the world was dangerous for the first time I've had my armies run away like girls and hide in the cities and fortresses. And that never happened before.
So yesterday was really entertaining and fun for me. And let's get to the mystery solving part. Because monsters was so aggressive I was able to figure out the main problem with monsters and why AIs is immortal to them. Its because stardock gone and screwed up badly lolz. Stardock made monsters target tiles instead of AI enemy units!
That's right, they target tiles not units.
Troll army lets out a war cry and wants to eat Ruah because Ruah steak sounds tasty.
Ruah trolls the Troll army by moving.
Trolls: What I could've sworn the Ruah was here... oh well lets go after him in that next tile!
Troll army attacks!
Ruah: Hur hur hur dumb trolls i'm the real troll here!
Ruah moves out of harm way again and plunders the lair for free lootz!
Troll army is now sadface and emoquits the game because attacking ai units is futile endeavor and hands in the resign application for working as a monster of Stardock and turns in a application form towards the Barbarians of Civ 5.
At this point I felt real bad for the Troll army and so I helped it by murdering Ruah for them.
Ruah got a cracked skull for her troubles.
And then the second mystery of lackluster response from AI factions when you crush their invading armies and launch a counter invasion to hurt them?
Easy, they don't recgonize the threat and wave it away and send armies towards other factions that they're at war against instead of trying to defend against a faction that's eating them alive without resistance. At this point i have razed five cities from Gilden and is staring at their capital now.
Their response? Send armies against helpless capitar who can't even hurt them because they are lulz weak must bully. This makes me understand that AI lacks the ability to prioritize threats. Why not just have AI worry more and more if they're losing more and more cities to a certain faction.
I'm not even sure on what to do anymore now, learning this has made me understand that AI factions is just basically an barbarian AI. Barbarians almost never have direction in their actions and response. I think i'm done with that map, I pulled into lead again. And Gonna be pretty invincible again. Too boring, i quit civ 5 because i'm invincible as autocratic empire too many weak ais kissing my shoes because they don't stand a chance otherwise, and it looks like it's the same here too 
Edit: Oh to solve this problem... Its very easy, just let the Monsters and ruffians and wildlands have their own turn phase instead of simultaneous turns. And then, human players will witness lots of murdering going on instead of being hidden. Barbarians in Civ 5 have their own turn phase they murder AI units. Fix plz stardock.
