Eh, I've done the fight solo as both War and Drk with out a tank swap and in DF so it's not needed at ALL time. Either way you did request for a swap so the War should've been getting ready for that. War's have always been the Tank to try and compete against other DPS which hell if you can beat a DPS as a War before it was all "Haha, suck less nub". Now with deliverance it just makes doing that easier, and I've noticed more than a fair share of DPS with out PLD passed 15. They are just DPS gone tank. As a tank your first job is to get the ever-living shit beat out of you and survive. Second is to worry about your DPS. If you're good at your job, you won't have to worry about your DPS and you can do both. Knowing when to stance dance is key. Some tanks shouldn't be tanks and should stick to a DPS class.