Stygian Onslaught

As someone who just return playing the game during nefer’s banner (no ineffa, no flins, no lauma), this SO was not really for me, I could only complete hard. But after knowing that arlecchino overload could defeat 2nd boss’ shield, I was able to complete menacing!

I tried fearless but a lauma-less nefer and ineffa-less columbina could not just do it (around 10% hp remaining at 00:00 timer). Any tips on how to optimize my 1st team since I think my other teams can do it