For the few people who haven't wrapped up the remaining Elites of Fang, I would highly recommend making sure you have Slow for Cid Raines as much as you would the battle. Seraphic Rays is an absolute Jerk of a move because of the total Dispel afterwards (includes Buffs like Wall or Planet Protector), and if Cid gets in a second attack before you put something back up, it's going to hurt.

I stacked Full Break and Steal Power on the guy, but his 4-hit Physical still did 400-500 per hit after Dispelling Mitigation, so the Magic is probably even more dangerous.

Slow helps for breathing Room, and come the might be a big deal because of his heightened Speed. Also, while I still recommend Wall, anyone with something like Mog's Heroic Harmony or other stackable Debuffs should bring it. Even with Cid's Break Resist, Debuffing him is a more secure Mitigation strategy than, and without Mitgations in place AoE Magic like his Bioga can hit in the range of 1.2k