Off tanking CM through DF is hell. Unless everyone brings the adds to you (especially during the boss where you protect Cid) you're going to have to go around rounding them up yourself. Personally, when this happens, I go for the regular melee ADDs first (usually with a quick Flash), then I bring them over to the casters ADDs, hit Overpower 1 or 2 times, bring those over to the healer ADDs, hit Overpower 1 or 2 times, then cycle through with my HS>SS>BB combo. The easiest way to deal with this is having both healers stand on the side of the ramp that the MT isn't on, that way all ADDs go directly there and you have an easy way to pick them all up. For every other boss it's just a matter of running to one place, flash, run to the other, target, overpower as many times as needed. Also I would recommend telling everyone that, during the final boss, the ADDs won't get off you and that the best thing you can do is bring them to the MT so that you, him, and all the DPS can AOE them down as fast as possible.

But yeah, this is honestly just how CM is. It's the worst dungeon to go through as WAR, especially through DF. I've heard (but haven't experienced yet) that 2x PLD is a lot more annoying, though.