Have any mages tried to solo old content, like maybe Karazhan, Molten Core trash (or bosses?), or anything else? I'm mainly interested in completing my list of enchanting recipes, but soloing could be fun too (if it's even possible). If anyone has tried any old raids or even heroics, let me know how it went...what spec you used, challenges, etc..
For example in MC, I was thinking of using a large amount of fire resist and dual specing arcane (raw damage) and frost (more survivability). But I've never stepped in there at 80, so I have no idea what to expect.