Stay in that little hallway right when you go into the last circular arena area. Enemies will funnel to you at a relatively low rate making it easy to take them out one by one. You wont have to deal with any of yhe gas/fire ceiling junk. Use a sniper for the shade, he's pretty low health anyway. Have a decent high impact LMG, quillums is what I used, to know the wizard down quick. She should spawn right outside the hallway. The only reason you would have to leave the hall is if oryx does his stupid fire circle thing, but even then just run out quick then back in. Other than that just watch out for the invisible taken minotaurs, but again LMG is your friend. Solo'd mine in a couple of tries, not too bad overall, not easy but not horrible. The last tip would be to pick a primary that can regen health on damage/kill. I used red death as I had a 310 version, but suros regime should get the job done too if that is what you have.