I used to use mirage/x-perl/atlas... tons, sorta stopped using addons a bit on this server. I personally like the in-game UI for warrior, on my hunter Bartender was a must, but once you get used to you're keybindings though you could play without action buttons even on you're UI.
Bartender is about the only one I couldnt play without on my retail toons. Atlas was nice, Deadly Boss/BigWigs/Omen/KTM if you raid is crazy helpful, but not needed on this server - Seeing as how bosses dont go thru phases as they usually would. Macro's are pretty important though, much more so than add-ons IMO.