I'm having difficulty. I work full time and I'm married so some might call me a "filthy casual" but whatever I don't care. Regardless, I'm trying to make the most of my time in game, so I get doing the crucible for 15 legendary marks, but otherwise all sources of legendary marks require like 240 light, which is tough to get to without legendary marks, so it seems like such a grind to get there. Any tips?