Sunset Invasion - Random.
I love this thing so much lol.
Plague - Historical
Disease - Fewer.
I just find this aspect of the game incredibly annoying.
Vassal theocracies - unlimited
Disables achievements but I just enjoy seeing prince archbishops around.
Satanists - off
I hate these fockers, and I hate dealing with them. I think I would like them more if I could just kill them off completely.
Chinese interactions - Off
I tried to use limited but they still popped up in Armenia. Weird.
Exclave Independance - Harsh
This helps prevent very dumb wars, like India having to defend Cairo from being taken back by the Kingdom of Egypt and stupid stuff like that.