No one comes to the Sorc class to throw rocks at people. People play Sorc for one of 2 reasons. They either like pets, or they want to throw lighting bolts from their hands. When I built a Sorc and I discovered I shouldn’t use my lightning bolt until the target was almost dead I was disappointed.
From a mechanic point of view Mages fury should be the class spammable. It would line up with the Sorc damage passives, unlike anything in the Dark Magic line. Make crystal the execute- execute sounds more like dark magic anyway.
Either way, the class needs a spammable ability that is not on the Destro staff. Right now I give up damage and efficiency to have a spammable since I loose damage for slotting a non Sorc skill (expert mage) and Destro staff skills are generally less efficient than class skills. It would be fun and thematic if that spammable was a lightning bolt I cast from my hand.