Dash attack to Fair should kill you, it's a pretty gay combo. Then again, if you really since it coming, DI away from it to make it harder for Sheik to hit you.
Can't get grabs off, try dash dance camping and JC grabbing at the right opportunity. I can't see why sheildgrabbing doesn't work...maybe you're pressing A at the wrong time? Also, I would saying do aerials to waveshine + grab, but that's pretty textbook. Also, waveshining them gives them a year to DI the up throw
You're pretty good? That's odd, I haven't heard of you in any large regional or national tournaments...
Anyways, l-cancel every move with Fox....just do it.