I think this set is way overpowered.
The objective itself would be a field day for Sith control, 2x Vader, 2x Emperor, then you can duplicate them again with the Clone unit? That's way too powerful. I think you'd have to balance it with a strong drawback, like those units are destroyed after they strike, or each time you play a duplicate you deal 2-3 damage to the objective. It definitely can't have 5 health in it's current state.
Way, way too powerful. That is my complaint about most of the dream cards. They are incredibly overpowered.