VP fight versus SO 3
Deis uses MT (Albel can halve), Emily kills Peppita, Jerin uses MT, Bowser uses MT and Terrorizes. Albel and Roger are bad on the MP damage end (not to mention the HP damage end), and that's before that's being halved. Priest has a lot of MP considering that he only really needs 1 casting of raise (And maximized MP killing isn't maximized statused).
MT barrage than works against VP. At best, it's the three fighters+Gandar (Terrorized) or the three fighers+Gandar (2 Two are confused). Either way, feels like VP is only getting the punch from two PCs on average, meaning they aren't killing more than 1. Jerin has revival (Yeah, L26, looks like there are above 50 levels in Lufia. Since floor 7 is endgame, revival feels like a fair thing to assume by at least the VP fight) and Priest has revival, so they can just pick off everyone but Gandar and go into the next battle with everyone alive, which just doesn't make it much challenge considering the enemies best bet is ST status.
Priest could have MP problems if he needed to use MP a lot of MP early, but that doesn't seem too likely unless you think they really get in trouble in fight one.