How would you rank the different moments in the series where you're forced to use multiple parties? These are often big climactic battles, so I thought it would be fun to discuss which were the best and the worst, based on both gameplay and the story aspect. Off the top of my head, there are five: the Night Raid in SII, the Ceremonial Battle in SIII, the Raid on Fort El-Eal in SIV, and the New Queen's Campaign and the Ashtwal Mountains in SV.
I think the Night Raid is obviously ahead based on the challenge of Luca Blight's fights, and how they've built up to him as a villain so well to this point in the game. I'd probably put the Ashtwal Mountains and El-Eal after, just because as final dungeons, they provided good challenge, and it was definitely fun to use some of the different characters you had collected up to that point.
I'd put the Ceremonial Battle after that, which for me, wasn't as great as it could've been, although it was fun as well. The New Queen's Campaign comes last because while I get the idea of what they were going for, the fights were definitely too easy, and SV's overall graphics just couldn't make the moment seem as epic as it should've been.