Mid screen (haven't extensively tested confirms yet, but I'm sure any C would work, as well as 5B)
214B (1) -> 623A -> 2c -> j.b j.2a -> AD.j2C -> Hotaru -> land -> 6C (full hold, the Wall Crush will give you time) -> 66 -> 2c -> etc. etc.
Its actually very reliable. Costs 5, refunds 3.
6300'ish damage from midscreen.
I accidentally posted this in the General Discussion thread first, fat fingers+phone screen fail
As a side note, I've been having enough fun with Haku-men lately I'm thinking of making a combo video just to prove how much better I am than mAc, so stay tuned.
There are other versions of this that are harder, and depend on your distance to the wall. Obviously, if you're close to the wall, just do a corner combo!