I got a rayflash ring flash a little while ago and have been using it for these sorts of things it's actually pretty good on the 580 on camera for direct fill flashing, highly mobile and easy to take off in a hurry to go to bounce flash insteadquite portable and i made up a little braket that can attach to my L bracket and use radio triggers if i want to mix it with off camera flash and the odins since the hotshoe takes the odin transmitter