One big thing to realize, is that you don’t only have 2 troops. You can keep pulling them down and fill up all the slots. This blew my mind when I realized this.
I put 3 melee troops in the front slots, the ranged/healing troop in the back slot, and the champion (or w/e they’re called, the named troops) in the back slot.
Works like a charm every time. If you do the anima missions, it’s actually an anima net gain.