I think Vault of Glass hard mode should be the main filter. At least 10 completions. This raid should be a lot more difficult and engaging as a raid like Vault of Glass than that glorified Strike called Crota's End and the small fireteam pseudo raid to kill Skolas. Heck, Qodron at level 34 is tougher than Skolas half the time. Vault of Glass requires so much more coordination with so many fewer cheese opportunities...if you can figure out VoG you are my type of teammate for King's Fall.