Actually Conquistador has accuracy and cavalry archer only 50% accuracy. Both unit don't have blast radius, thus it should only hit one unit at a time.
(this statistic is without any upgrades)
problem is that accuracy (50% initial )is if it hits target. If doest hit, u have something else. So, if u hit target u can get 50%, and lets say, max_damage x 50%, otherwise, if misses, it does 0 damage. thats problem, Conqs randomly hit and miss target. CA, doesnt have that problem. If target doesnt move, without thumb ring and ballisticas, it will always hit target and do max_damage x 75%, where is 75% the chance to make max_intial_damage, calculated by attack points of CA, and armor points of target. But could be I wrong, and Conqs and CA both do randomly misses, I will do tests again
Interestingly, u gave me some nice ideas with this :D