Playing as Portugal, in 1515 I decided before the time limit runs out I decided to test my ability to overrun the African states of Mali and Songhai to see if those states are crap to play because of lack of Attrition. Well its pretty much the same as EU3 with barely any attrition I managed to march from the coast to Timbuktu and back suffering 0 attrition on a 10k stack and wipe out any resistance with minimal loses. The fact I was able to transport 10k (and spain 20k) that distance and then march across harsh terrain while maintaining strong supply lines in 1515 isn't fun. To top it off I managed to convert all the Muslim provinces in under a year and core them in no time. I will totally endorse implementing the attrition system for pagans from CK2 which reduced supply limit dramatically for all American, African and South East Asian kingdoms, and making coring costs 200% more expensive.