[@Martian] 
My concept at the moment is a former Agent of Shield. More specifically the secret sub-division of Shield, [url=https://marvel.fandom.com/wiki/Wizardry_Alchemy_Necromancy_Department_(Earth-616)]W.A.N.D.[/url] I see it as Doctor Strange and the Masters of the Mystic Arts handle more outward facing threats, while WAND deals with more domestic problems. Basically the Sorcerer Supreme makes sure the Earth doesn’t get invaded and WAND stop magicians from screwing things up for the everyone else. 
Now with Shield gone, MC would have stepped up and joined the Avengers to provide a little more mystical insight when Dr Strange is busy.