I like doing every quest I can, it's a habit. *Laughs* I'd solo 'em if I could, but even Voracidous the Invincible, at a lowly lvl 32, gave me fits. And the other raid bosses appear to be at least lvl 50.
I might as well ask while I'm looking it up.
If I start TVHM can I bounce back and forth from it to normal mode as I please with the same character?