2 tea sets for mea s well.
I build my first team with Single target nukers Alpinia, Mei, Sakura, and added two Skill activation girls (Burning Bush and Nerine) to increase the odds of skill activation. Alpinia and Mei are both maxed out (thank you rainbow dressblooms, that we no longer get to buy for Flower Gems...).
Usually the 4th Squad clears the boss at worst, so having an Ally team as a back up is just an extra safety.