It random, but easy. Had he participated in the revelry he could have gotten high power gear for any specific armor "three weeks by the way" on top of prime engrams that always guarentee a higher light drop even if you go up by 1 light. It's not hard as I have said I barely played on my titan but I managed to get it to 690 to do the mission. Also in reply to your other comment I am not a troll, just pointing out the faults in others who blame everyone and everything instead of taking a step back and taking actions for their consequences. The man said he was only at 650 and left after a few hours meaning he bare5 did anything in the new season which means he is at fault but of course "I'm tHe BuNgIe LoVeR" whatever.