Inv/SS- Classic combo. By far and away my favorite. Probably more time spent on this toon than all my others combined. IO'd to the hilt, but left the Incarnate stuff alone. I never cared for that as an endgame. You're not a real tank anymore, you're something... else.
Loved being pretty much utterly invulnerable to almost all physical damage, with that Psi hole that you'd fill in as best as possible. I enjoyed defining my characters as much by their weaknesses as their strengths, and the Psi issue gave it a very real, very comic-book feel.
Laughing off most attacks, drawing as many baddies to you as possible to amp up Invincibility, keeping your eyes peeled for the Psi attacks and the dreaded end drainers, the -def and -res attacks, it was purely second nature. Scanning the crowd, identifying the actual threats, dropping the KO Blow on them while Foot Stomping the fodder, taunting all the while... man, I miss playing.