By the way, what's everyone's experiences on dealing with the Mongols? Because I'm starting to get a more than vague suspicion that they're ridiculously overpowered and could solo everyone else on the map simultaniously if they so wished.
As always different scenarios are possible.
Both hordes can appear at the same time and fight each other. That takes them out of the picture right away.
In my current game Ilkhanate failed to establish itself and merely contends with local muslim states for the title of the local power. Fears BE.
Golden Horde was quite succesful though having conquered eastern Rus then jumping over unified western-central Rus to Finland, from then to Denmark and from then to England (Sic!). Used to be the biggest power in army size but internal squabbles ruined it. Now in decline, wont reappear most likely.
Timurids are a joke really.
I dont like this nation jumping, mongols shouldnt avoid challenge from Rus and BE since they wont consolidate with those huge gaps in between. Of course with mere 120k they cant conquer Byzatium so...
In summary: BE effectively shield the christian world from Ilkhanate, GH can be powerful but lack direction.