[DFFOO GL][Kurasame LC]Non-synergy Cor, Lightning, Aranea (no forced launch), 2 Cor buff at a time
Arguably Cor is the only support in this party and he is not even a dedicated one. So I think he is doing great dmg considering the "weight" mechanic that requires launch is not properly dealt with.
@04:30 Clutch enemy turn interruption
This was the clutch enemy turn interruption that I was talking about in the Cor event video. If you time it right as the recover from break you can get a fair amount of extra turns for further delay and manipulation.
That can, of course, be a double-edged sword when it comes to Lufenia orbs. If the orb is about to expire and it requires enemy to take a turn, then it can possibly ruin your run, so do beware of this.
2 Cor buff at the same time and characters with buff extensions:
Ordinarily Cor's buff can only be on one ally. If you choose to grant another ally with his buff using S1/S2, the original one gets removed. However, should you put one buff on one character first (Lightning in this run), and then remove her from the field with a summoned friend and grant the second party member (Aranea) with the buff then, since Lightning is no longer in the field, the buff cannot be removed. So after Garland is gone and Lightning returns (XD), you can have both Aranea and Lightning with Cor's buff on. As long as you don't use S1/S2 to refresh the buff, they will stay on both consecutive turn characters and you can have so much Shenanigans with your party with this trick.
Another thing is Cor's buff is extendable, either through certain buffers like Hope/Sazh or through personal buff extension. In this case, Lightning extends her own buff whenever she uses her EX. The buff also does not deplete during BT phase, so Lightning can further extend Cor's buff when she uses her EX during BT. You can see at 08:35 she starts BT phase with 4 turns (leftmost buff) and then it ticks to 5 after EX and back to 4 after BT phase (since it counts as 1 turn has passed). So you can have someone taking consecutive turns and extend this to preserve its longevity and keep going without refreshing its duration. It makes the 2 Cor buff trick even more lasting. Papalymo in current JP comes to mind with this abuse, because he can extend his own buffs by 3 turns with EX (and there are a lot of EX chargers going forward lol). Selphie also extends buff and she buff Ex recharge as well, so there is that to look forward to testing more when they come.