Originally posted by marvelprince
Dr Strange is there for more than just back up. He's fulfilling the role that Tony Stark usually filled on classic Avengers, providing a place to stay and transportation. They have his sactum as their headquarters plus his spells to carry them around.And anyone who really knows about Dr Strange nows that he's not all powerful. Sure h'e s done some crazy s*** before, but overall even he's shown to have some sort of limitations. An example is that t eleportation consecutively(especially short distances) has been shown to be exhausting.
actually, teleportation has always been tough for the doctor. read classic Defenders. it's a hard spell to cast, and it damages the shield between our plane and hell.