At the moment I think Supergirl's prime objective will be trying to stop all the obelisks from taking out chunks of the city.  She could also potentially help Static I suppose, but since he's knocked out cold, unless the remains of the tower fall down on top of him, I think he'll be fine...as he bleeds from his nose, unconscious, on the ground.

Sorry mate but the big explosive Obelisks are a little higher on the priority list right now.