I just made all the character specifique missions with elphelt yesterday night.
For mission 43 : block and then 2HS, 2D, 214K (it does 101 !!)
The other mission i was stuck on (the ino matchup part 2, or 1) i tried 2HS, cS, jS, jP, jS, but i never managed to do it. The jump cancel windows from cS to jS is very close. But i figured out another way to deal with this mission : 5K, 5S, 2HS, 2D, 214K (the 5K must be performed when ino is really close). I don't know how much damage it deals, but more than 100 (as it success each time)
For some of them (if you have a lot of time for the first move) you can do 6HS, 236HS, SH-S, SH-HS.
If you have issue with some of the mission with elphelt, you can ask me.
P.S: i'm still unable to perform Challenges n 22 with this stupide jump dash K, S, HS !