Lol.
Stage 2 got me 975k Points. I picked up the phone on that phase with the non-stop-resurrecting skeleton and I scored a 250 x Multiplier as I was spamming click-click-click. Was totally distracted. Fun times.
It's kind of weird. Psionic is ez-mode from the start.
Engineer is a very steady choice, and much less boring than the Psionic.
Juggernaut is probably the one I seem to find the weirdest; it does fairly remind me of my Warrior on WoW, lulz, but that's about it. Quick Jab is pretty much the equivalent of those opportunity-grabbing skills (Overpower *cough*)
I've heard people say the total opposite, how Psionic was the toughest, but heck, I have to admit the three characters are equally powerful; it's just a matter of playstyle.
Pinch yourself!