anyone that still plays this, have some good setups for fighting Ozma 220? or CoD 220? recently got up to those points and i want to just get it done without too much trial and error considering only a couple of days left in event.
Ozma 220 I found was easy since you get 4 RW charges and the Dr. Mog RW pretty much trivialize that phase of the fight. Bring heavy damage and last stand since the boss still hits hard but has a low HP pool per phase. I'd probably RW Phase 1, 2, 4, and 5 though you might want to swap RW usage on 3 and 4 depending on what damage type you bring.
CoD 220 I'd recommend bringing Magic Blinks and two forms of Hastga. I had a level 75 Aphmau on the fight since I pulled her USB on banner 1 and it has instant cast Hastega. Consuming Beam only comes at certain %HP points so you can pre-cast your Hastga SBs / Shellga once you know where those points are (I'm tempted to say they're around the 66% and 33% mark). A second healer is useful here just because of the raw damage output CoD can shoot and you can take advantage of this by bringing someone with a Radiant Shield as well (in my case Tifa w/ USB). Just bring two healers for safety. I ran Ovelia + Aphmau since I had both their USBs so this gave me access to Last Stand, Instant Cast, and Hastega for the fight.