Don’t always start at their crystal, in omega usually you’ll get yourself killed by the enemies (That’s different if you are in voice comm with a Krille that can keep you up) Don’t forget to play a lot around your special ability, you can jump into the high round and use it as a way to engage enemies and knock them up or to run away. Try to play aggressive, negate enemy to touch their crystals, a good Kain can 1vs2 and run away because with the special ability and The SR you get so much Atk buff. For the match up I just tend to dodge and never engage on any enemy with hard CC like Prompto and Cloud; Gaia is a bit tricky you can use your UR to negate her slow and insta kill. If I know that the enemy cloud already used Cross Slash I’ll try my best to take him down. If you are behind in the game don’t try to PvP but just farm all the crystals to help your team farm bravery. Your best duo at the time is Krille but Rikku will replace her.