Man this thread is freaking amazing. 
Corner pressure!
Get them to block B+HP. You can do this terrible little setup:
B+HPxxLight Bats>HPxxLight Bats>B+HPxxLight Bats>HPxxLight Bats. Works against most of the cast.
If they attempt to jab after blocking the B+HP, it will whiff since the bats make Mira move backward a little bit. They will eat the bats and you can confirm a manual into combo. If they attempt the jab after blocking the HP the same will happen. If they attempt to jab after the bats they will eat the HP or B+HP since bats have a lot of plus frames on block. You’re basically tossing her most plus stuff at them in a loop.
You can do the same thing with just B+HPxxLight Bats about twice before the timing gets wonky. HP drags you back in a little bit and keeps the timing reasonable.
Also random tidbit - if they block St.HP you can get crouching jab to come out in 1 frame, and if they block that too you’re +2. I usually do medium or heavy reaping at that point.