Salad Fingers needs a buff. He's SO SLOW, has low health, his damage is ass, he can't platform for shit, his combos suck. Bro you NEED to buff him BADLY!!! Everybody else is balanced, but SF...ugh.
And FINALLY, i beat the whole game on OMFG mode! Convict and Salad Fingers' stories were the most difficult by far! Replaying it Salad Fingers is still ass though. A good strategy for him is to stay long range and abuse his jumping ability. Also crouching whilst attacking is a great idea. My point is unlike most of the other characters: DON'T STAY IN THE NEUTRAL YOU ARE UNSAFE! Stay somewhat close to the powerups (within 1 platform away) and abuse SF jumps. Did I mention SF jumps? Because WOW you need his jumps to win.