Ah yes, but thats not what I meant.

Force Blast for example says that you can do as many blasts as you have hands.
Further, lets say you have 7 hands (all of which are currently unoccupied) and there are only 8 enemies.
You throw one force based blast at three of them (you are just trying to nauseate the most imposing ones).
Now you have 4 hands idling.

The ability you just used (force blast) has an action cost of a standard action.
Could you now occupy the idling 4 hands with other abilities that also cost a standard action or less?
Theoretically that shouldn't be that big a problem since its only a difference between blasting something or doing something else, you are still using the same hands.
So with the idling 4 hands you could try to initiate a mental strenght movement. That also costs a standard action to initiat iirc.