Okay, here is what I know about the party.
Robert: If I have this right, a Master of the Unseen Hand in some kind of construct body. Easily the most optimized in the group, with the exception of Peter's unknown. Wields something like 6 vorpal swords via TK.
Zafar: Some kind of psionics natural-attacker. Has a Dex of something like 12; I figure he's a Shivering Touch candidate.
Mike: A wizard, but not optimized. No idea past that.
Sam: I BELIEVE she's a bard. She's more focused on storytelling than rules, but the others made her character.
Ian: No idea, but from what I know of his other characters he won't be a problem. For instance, in a very high level game, he thought at-will Produce Flame was good.
Peter: Unknown. Danger is compounded by the fact that he's versed enough in CO lore to recognize my username in real life. The good news is, I'm not actually sure if he'll be against me in this; I've not been counting him so far.
My starting level is 30, I believe. (Remember, no Epic Spellcasting, though.) No idea on the conditions of the battle, but I'm assuming basic arena with normal init structure in place.
My motivation is that, in the optimization camp on my campus, I am something of a local legend. Russ (the DM), Zafar, and Peter have all seen my work on the CO boards, scant though it may be, and informed the others that I'm some kind of optimization deity. So I'm basically defending my honor here, but I have to do it in a fashion that will be fun, for four reasons. 1) Sam is very, very hot; 2) I'm a DM at heart and care; 3) how good at building characters can I be if I can't restrain myself; and 4) I really do need to emphasize here how hot Sam is. It would also be nice not to bruise their egos, though, as this campus is quite small.
My current "Rip Them Apart ASAP" build is Shaedling Sorcerer with Celerity and Time Stop, then gossamer up a Ring of Infinite Everything.