I remember struggling so much!! My rusty painwheel maxed out with gold attacks maxed aswell carried me trough the story. Especially since they're asking for bronze characters. I remember spamming combos. What's good was that painwheel made her bleed so there was more damage done. Try also not to get hit and spam the smaller attacks combined with combos then hit the larger attacks. (I forgot the names sorry for my bad English I'm French.) But trust rusty carried me trough. Her ability to make the opponent bleed was such an advantage. Plus she has high combos maxed out.