Not sure about 25, but 10-man was do-able with 2 paladin tanks, although it takes some coordination and a lack of lag. I'm still not sure why it worked like it did, but I'm happy that it did.
Over vent, we counted to 3. On 3, we both taunted each other. If we did it right, they swapped.
Like I said, I have no idea why it worked, but it did.
GL
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Icbat, 70 Pal, Skullcrusher (US) (Horde)