Two thoughts:
1: I thought there was a rule that the bonus from a Rebate power can't be more than one less than the cost of what it's tied to. So a Cold-iron catch could be worth up to +4 by the rules (very widely known and easily accessed), but if you've only got Inhuman toughness (-2), you only get +1 for the Catch.
2: Orbius looks much less OP when you note that it's an 8-shift spell, so your average player will have to eat at least 4 mental stress just to call that much power, and probably a few more shifts of backlash to make it go off straight. Also, for comparison an 8-shift straight attack will completely bypass the entire stress track of anything without at least Supernatural Toughness (or Inhuman Toughness and Hulking Form).