ok peopel dont want to give SCH refresh/regen III etc for whatever reason, because it wont make it "unique"
DNC is unique because his healing power relies on TP instead of MP.
What do mages lack? in battle we are not capable to do Skillchains, unless we engage the enemy and try to hit it

.
As far as I think SC are classified as magic dmg, correct me if I am wrong.
My Idea would be to give SCH the Skillchains as additional nukes, that support thus the dmg of BLMs dealt in PTs/HNM fights indirectly.
We basicly create a way where SCs are generated in MP instead of TP.