I did 3 Oryx challenges in roughly 2 and a half hours using that method. Including the one where I was with 2 underleveled Strikers titans and only 2 of us were 315 or higher. I would be more willing to party up with someone who is 310 with a 10.0 than I would be with a 320 at 8.0. Edit: Based on stats, I would be willing to believe that you can handle yourself in the raid. I looked through your past raids as well and not just at your k/d. Typically in the top 3 of your team and rarely at the bottom. That's a good sign.