Is there a reason the last Lion map is a lot harder for me than the last Instructor map, even though the enemies are the same level? I only started playing about two weeks ago, and haven't gotten any kind of triangle/square advantage idea figured out, if that's the reason.

Also, I just got Bertha (Instructor event) to SSR, should I switch to Lion now and just spam that and try to get whatever unit to SSR, or go for Bertha UR? And are Gacha units superior to event units of same rarity, like in FKG?