Well, I currently have a level 70 warrior alt. Most of my gear is DPS gear (I was prot, but respecced fury and back to prot now.) and I was wondering if I'd be able to tank instances from 70-80. I have about 2 pieces of tanking gear and I don't know if I will be able to tank with my DPS gear. If not, what do you suggest I do? (I find fury and arms to be not much fun.) and if you say questing, well I'd rather just do instances and I have rested XP at the moment so I can get the most out of instance running.
Also, what rotation should I be using in instances?
Edit: Already got the answer to the gear, I can get the Cobalt set. Any tips on rotations etc?