Nope, just practice unfortunately. The first 6 missions for most characters are relatively harmless, but the last 2-3 for everyone are painful. I guess if I had to tip:
- it helps if you have the Jill and Shuma characters for the 20 extra missions towards the trophy, but that dlc may have been delisted
- input timing in umvc3 is loose to say the least, so you can use button mashing to help timing
- it's not apparent, but some missions will require tiger knee (qcf but go past forward towards up) motions instead of the listed motions
nemesis mission 9 for example
- don't do those wolverine missions first. Or x23. Ugh.