As Katarina:
- u/f+3+4 will hit Xiaoyu out of AOP (but not AOP down)
- b3+4 (not b2!) OSes ff2,1 and ff2,1b > BT, but can be baited with just ff2 and launched with standing 3. The 3 occasionally seems to whiff, but only occasionally.
- bait her moves and whiff punish
- SSL her wr3
- don't d+1 her since AOP+SSR beats you hard
- abuse generic d+4 and its range to hit Xiaoyu out of AOP and evasion shenanigans
- FC d/f+4 is also good vs. her so use it consciously