I have 2006 Centaur on one of my bikes, and it seems pretty indestructible. That said, I've had serious trouble killing some ~1990 600 Tricolor and have even been utterly defeated at making mid-nineties 9-sp Campy Veloce do anything wrong either.
Most of the stuff is pretty good these days. But if I had to pick a post-Nuclear meltdown group, I think I'd go with Dura-Ace 7700 with d/t shifters and a 7410 crank and bb.
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