[Xantar]

This is one of the places where you'll want to use grenades if you have them. Don't worry, you'll get plenty more. If you have an incendiary or hand grenade, throw it at the big blind guy. Then run up to one of the two doors in the cage and shoot the lock off with your shotgun (it will take three blasts or so). That will get you out of the cage where you'll have a much easier time defeating everyone.