Yeh but it's not called Dark Transfer, and I don't know why they made the distinction.
Again, Concealing herself in the force, there's nothing to say she can't do both.
And it doesn't matter if it weakens, her, as long as she can Force Drain at the end.
Concealing herself isn't gonna work here, because of the place they are all fighting in which is just a 10 meter mound, plus Force Concealment is very taxing anyway and plus none of the combatants here are stupid enough that she can just hide away from them anyway in plain sight especially if all of them know that there are 4 opponents around.
At any rate, I don't see Malgus lasting very long anyhow, all Traya doing is just gonna be wasting her energy trying to keep Malgus up.