Haven't really seen anyone mention it yet but you can get some pretty real damage off of B flashkick CS. Hitstun feels like it's really long no matter what, CH or not. I've been doing this:
[2]8B CS 6D j.A j.C land j.A j. j.[8]2A 2[C] 2]B[ 2A [6]4A 2]C[ ender
Enders can either be [6]4A [2]8C for damage or j. j.C j.[8]2A for gem oki. EX ender does ~4500, oki does ~3700. I'm sure you can get more, but it's a start.
Works on the cast, CH or not, AA or grounded.