I don't know about midscreen, but in the corner I've used 4D in the middle of Mu's 6B>63214C string and I was able to CH them due to 4D's invincibility.
Edit: Correction. It doesn't CH but we can still combo her with 4D.
ggs Akihikio. I never realized how amazing 5C and 6C was in this matchup. Still it's hard to choose which one to use against you when you come flying across the screen. lol.
Also I'm still taking matches for the next hour. Come play me people.