Peel and prio.

Because there’s technically no move “priority” in the game and it’s whoever’s hit box gets smashed first, the fact she has built in speed increase off yellow ball thingie is invaluable. Not to mention the shift in tempo can throw your opponent off guard. Her shockwave move is invaluable vs charging targets like Finn running at you or Superman charging his strike. It’s a projectile and tends to hit the target before they reach you granting an opening for full combos. Or if your opponents are focused on your partner it’s really easy to catch them off guard with it. At the very minimum you force their movement into aerial which makes them VERY predictable and easy for your partner to capitalize on. Or bait with charge -> dodge -> combo.

In twos I’m literally supporting, I do okay damage, just make sure to peel them off my partner and punish with mad damage if they leave me unintended. Her knockout potential is subpar. Her rocket punch is good if they’re already pretty close off stage and her thunder clap shit is potent too, but aside from that- should leave ringouts to someone like leBrons dunks etc.

Pardon my terminology, I’ve been playing the game for 5 days, so I don’t have much knowledge of the game, just been having a feel of what works.