Well, some question here, how many time you use weird team set up or composition? and what kind of team it is?

I ran double mash and a level 1 spartacus once. It didnt work.

Double Marie + Caster Marie in few Blackbeard raids
Fights were quite long and Maries most of times finished fight with full hp

Well, as soon as I can get my Martha Ruler up to speed, I plan on trying a double Ruler team (triple if I can find a Shirou support) cause yolo. But I definitely am not going to try to run that against a Jalter.

For Fun reason.
Like I run Vlad+Geogies+Geogies versus rider.
Or Leonidas+Mashu+Nightingale versus archer with high hit account but single NP.
Or Maiden teams like Arthuria+Nero Bride+Tamamo