Hahaha oh my god. Jesus the difference between Mordred (no PF) and Hercules (PF) is SO HUGE.

With Hercules? Quetz dies on turn 4, after spending two turns buffing herself. Zero threat.
With Mordred? I almost wiped after my turn3 FB didn't even get her to half health, so Overdrive happened instead of Trigger. Jesus, Herc team basically KILLS HER and now I didn't even take half off? Oooomph.

It's really hard to understate just how important PF is, and thus by extension, Hercules(/Shingen if your build is better suited for her, which should be rare for now).