Hrm. Maybe I've been playing this wrong. I'd been playing it as a AOE (large, but *not* mega scale) Invisible Cumulative Mind Control with a Variable Trigger. So the mentalist saunters into the police station - where nobody knows who he is - and starts filling out some paperwork or whatever. While he's doing that, he starts flooding the building with a "Defend me at all costs" command, triggered by different cues each time: three clicks on the radio, or a code word from him, or seeing a specific image or whatever.
I've been playing it like: the cop (for example) goes along with his life, but breakout rolls don't start because the power hasn't actually happened yet--Variable Trigger. Then, the breakout rolls kick off when the Trigger goes, but Cumulative has meant that the mentalist could get some pretty spectacular EGO+50 lined up with some time: Violently Opposed; Victim Thinks It Was His Idea. They've been making their breakout rolls in due time, but not before critical treachery was accomplished. (Plus the power's Invisible, so heroes with Mental Awareness don't have anything to notice until the bombs go off.) If the breakout rolls start up when the power's put "in place" - before the Trigger fires, in other words - that would make for a completely different situation.
At this point, the discussion's a little academic: my hero team got finished off last session, and the mentalist is somewhere sunny, wealthy and surrounded by girls. In all fairness, the PCs missed pretty much every clue out there: when a trusted friend opened up on them, they figured the attack was coming from behind him to frame him, etc. There have been a steady stream of those sort of mistakes, and in the final battle, fully half the team had been hypnotized to attack the other half, anyway. We had a good laugh at the tale of the tape at the end.
That said, I've enjoyed the thoughts. I should've registered here years ago.