What Content NEEDS Two Tanks?

[Vactus]

T1 and T2 can be done with 1 tank.

I believe the only things requiring 2 tanks atm are T4, Extreme modes and Ultima. Not sure about King Mog.
So that leaves you with a grand total of: 5 things(Not including CT since you're forced to take 2 tanks in there)

I keep seeing this around about T1. My question is how? Kite method when they combine? Also adds on ADS T1? Honest question no sarcasm.