My experience- I've played and raided since vanilla, started as a warlock and raided mc/bwl/aq40 and naxx. in wotlk i switched to a dk and played through naxx/ulduar before quitting due to job schedule conflicting with raid schedule. In cata i switched to priest and played main spec shadow but also offhealed throughout the expansion.
What i can bring to the table- I do my homework, researching all the boss fights and theorycrafting best specs/gear. I use 2 raiding professions for top dps/heals.
reply to this thread or message me in game. battletag is benjammin#1426