Originally Posted by Sasara Kusugawa

I'd suggest you switching back to Convallaria in your team as you don't have a Magic girl now. She's a real tanky yandere, go and max her out and you'll see what I mean. Plus, her AOE is pretty good even if her skill is only Lv.1, doing 1.9x damage to 3 enemies which is considered high for a gold unit.

Having a full team of HP stealing units can be devastating and can also be used as one of the many setups. This will greatly increase your squad's survivability against tougher pests. About single target teams, they are really effective in wiping out stronger and tankier bosses. One of the bosses in Geranium's Phase 2 Ultimate is a very good example of this (120k HP with 5k ATK WTF) and you'll see that single target units are excellent for this situation. But anyways, it's all up to the player's preference. Some make a full AOE team, some have a full single target team or a hybrid of those two. Having a Dodge+HP Absorb team can be incredibly annoying.

If that is the boss I'm thinking of then the damage is % hp based not static and it will not hit the same unit so hard again. I could be wrong tho, it has been so long since I did that event and I don't need the reissue.