Dual Ultimates: Completely Worthless?

[GrandMajora]

Am I the only one who's noticed that the dual ultimates you unlock from getting max friendship with your masters seem to be a little broken?

The concept of them is that you and your mentor both launch an ultimate at the enemy simultaneously. But from what I understand, the enemy can only be hit by 1 ultimate at a time.

So the dual ultimate actually cancels itself out by only hitting the enemy with one of the attacks!

I could be wrong about this, but that's just what it looks like to me, after trying out a variety of them.

[NorseiTenshi]

there is another bar that when you use it and get it higher. well the damage goes up too.tried it with a friend. i dont know if their stats are to take in account or not. it can deal quite a lot of damage xd

[AlphaASX]

They are trash

[Battlefoxx]

They are guaranteed damage in PvP as long as your teammate is able to respond to them. Damage-wise, they are on the lower end (think Super Kamehameha), take a long time and do not allow a follow-up afterwards (or barely).
In PvE, Hercules's Dual Ult can be used to heal an HP bar for both characters. Rather neat in PQs, difficult / impossible to do in Experts.