There are other options like stealing, or replacing enemy SAP tiles using characters like Rescue, Hela, Daredevil, Gambit and Starlord. Only Kitty can replace CD tiles in 5* land. I don't think Blackbolt will trigger BRB's ap gains for whole board destruction.
if i'm reading his black right, at 450 and 5 covers, if you fire it with brb when there are 4 protects on board, for 7 black ap you do 46k damage and generate 4 blue and 4 green ap.that seems... much.
(snip)Special Limited VaultEl Sabah Nur Vault - May 14 - 17(snip)