First one: Kuja, Rosa and Locke, Ifrit summon (level 30), Quistis friend.

The only thing that needs attention is the first wave because Serah + Thancred is a deadly combination, so focus your attack on them to kill them fast (I try to kill Serah first), because Yuna is not dangerous. The rest went pretty easily. I replaced Locke with Quistis on the last wave and focused on one target. I killed Bartz first but I think it's better to focus on Exdeath because he can deal a lot of HP damage that can lower your score. Everyone has their EX weapon. Kuja's EX is necessary (so that he can spam Ultima), while Locke and Rosa (to a lesser extent) can live without it.

Third one: Lightning, Lilisette, Vanille, Ifrit, Quistis friend.

I cleared it in 50 turns so I'm still not done with it, but I think I can do it with this team. Lilisette and Vanille make every enemy hit like a wet noodle and Vanille also helps with crowd control. Lightning is there to hit hard and delay enemies. Once again the first wave needs attention. I kill Vivi first because he can be pretty dangerous after he uses focus, but Yda is pretty annoying to because of her poison debuff, but she doesn't hit as hard as Vivi. On the second wave, summon or use Quistis and kill Edge asap, before he uses his second skill.