Like I suspected, the cost of my lord witches caused problems during the initial rush with black wolves on the god-tier map, forcing me to retreat Aria because I couldn't get my healer out in time to help her for 2-stars. 2nd trip, I switched Belinda with Nanaly, and had her kill everything with her quad shot...
I did a 30CC Daniella, and she was holding me back from being able to properly do a lot of maps until I made a proper 50CC Daniella. I consider the decision to class-change her early to be the biggest mistake I made in this game. Strengthen I's 1.1x multiplier doesn't do much, since her base stats are low, and raising a 30CC Daniella's skill level is a waste of silver units (if you're going to feed her Clave, Mortimer, and other copies of Daniella, you might as well use those units to level her up to level 50).