Quote Originally Posted by Jubez187 View Post
What Content NEEDS Two Tanks?
Crystal Tower (No odd setups allowed, hee!), Extreme Mode Primals (Definitely Garuda anyway!). And usually King Moggle (Boss on MT, WAR/PLD on OT) and HM Ultima (Aggro trading for debuff stacks).
The Entirity of Coil has been done with One Tank - it's pretty easy for Turn 2 if you're using the 0Click method on the final boss. For Turns 1 and 4 it's a lot trickier.

Honestly Turn 2 and HM Ultima's "Normal" methods (Aggro trading) are probably the only situations where I've felt there was no designated MT/OT and both tanks were reasonably equal.
That said, I enjoy OTing certain content like Turn 4. Proper add-handling can take more skill than just keeping your Face in front of a Boss's Fists.