Return of Reckoning

Is it possible to use the def sov gem and the offensive sov gem on the same character? e.g. to have
off sov cloak
off sov Boots
off sov gloves
def sov shoulders
off sov gem

and also

def sov helm
def sov torso
def sov belt
def sov gem

To give you the 5 set bonus from off sov and a 4 set bonus from def sov?

Want to know before I spend my precious crests.

No. Both occupy the same jewelry slot.