Run corrosive armor on your back bar. That's how I did it. With the fighters guild passive for more ult when killing daedra, you should have another corrosive armor up before the next guard spawns.
If you learn to circle strafe the crem guard, they aren't a problem. Just stand off of their shoulder and move in a tight circle, the entire flame cleave will miss.
If you learn to circle strafe the crem guard, they aren't a problem. Just stand off of their shoulder and move in a tight circle, the entire flame cleave will miss.