After 3 x weekly and 3 x nightfall I admit I went under the stairs at the front right. On 3 of these occasions I was the last guardian standing and proceeded to kill the boss when he walks over to the front corner, can't hit you, whilst you get precision shots. If sitting in a corner designed by bungie to kill the boss is cheesing then yes I will do it. I have other things I would rather do than start over again.