Who to upgrade and which incursions crystal to buy?
I am pushing for cav, and will do variant 3 and 4 once I hit level 45 to get another few 5* and some more rank up mats. Would like to know who to upgrade from quake, guillotine and iBom. I will be able to take one of them to r4. I can quake and shake (can't heavy only) consistently (apart from silver centurion who always…