Is there anything about rerolling a reroll using Prob control from 2 different people? I know in most games you can't but i haven't seen anything that says you can't in heroclix.

As far as I know, nothing prevents it. I do it all the time when playing a C.S.A. team.

As long as the roll is allowable for PC to begin with, all of the PC'ers on your team that have the proper Line of Sight can use their PC on the roll.

I once played in a 2000 point game against a guy using Dark Phoenix and KC GL supported by 3 Destinys and 3 Dominos. He never missed, and I didn't often hit, unless I was targeting a PC'er.

Yep, there's no rule against it. You just have to follow the normal Prob Control rules for each roll (your rolls on your turn/their rolls on their turn, within 10 spaces, have line of fire, etc.).

Wow..... that's just nasty. About all you can do it to take out the PC first and hope for the best on the rest (keeping your higher AV figs away as best as you can)........... Just wow.....