It fooled me, I always thought that mental blast would be a super attack, but I quickly realised it does the same damage as dominate and mesmerize once I got it. Oops!
Perhaps the lure of these attacks goes back to the old days when people thought it was bad play to slot controlling powers for damage. So they threw us normal blasts at the same damage which people would slot for damage and go, hey, they can actually hurt! >_>
I felt it would be worthwhile to point out that Mids' Hero Designer automatically assumes the target is contained when displaying the damage on epic powers. For all other powers, you can either toggle containment on or off (from clicking the Totals tab and then the Containment inherent power), but the epic power damages are doubled even when it is off. This led me to believe that epic powers deal way more damage than I thought they did originally, but it turns out most of them don't do much more damage than your immob and hold powers. Don't be fooled!
Perhaps this is old news already, but I didn't see anything anywhere about it and thought it would be helpful for new controllers who rely on Mids.