Okay so here's the final version of the combo I've been working on. It works from any level of Mist, but what's unique about is that if you start with Level 2, you can instantly recoin back into Level 2 and then do a combo without worrying about having to recoin. The combo still works if you hit Level 3, but it's a waste of levels at the point because you should've just gone for MF-S(2) instead. There is some character specific weirdness due to their hitboxes/weight that I've listed below.
Doesn't work on: Bridget, Millia, Baiken, Dizzy, Johnny*, May*, Potemkin*, Justice*, Faust*
*High coin hits these characters immediately upon use.
Level 2 Re-coin doesn't work on: Slayer, Eddie, Jam, Kliff**, I-NO**
*On these characters, the combo goes to Level 3 if you start from Level 2. Level 3 is still comboable though, and does more damage. MF-S(2) is preferable to a Level 3, however, so you should avoid using this combo on these characters when starting from Level 2.
**Can't be hit by 5K either, your only option with these two is the f.S version
f.S Level 2 Re-coin doesn't work on*: ABA, Anji, Axl, Chipp, Testament
*On these characters you can still do a 5K version and get the level 2 re-coin
Input:
5K > 6P > high coin > 5K/f.S (very strict link) > MF-P(2) > 66 6H > jS > jS > Ensenga [DM: 165'ish]
Tip for high coin > f.S: hit the S button right when Johnny's grin disappears.
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EDIT: I just barely discovered that it is possible to do midscreen j.D > wallbounce > air combo off of this setup. Not sure if it can lead to something better yet though.
Random Note: jK is noticeably even less optimal than it was in AC+