2-3 hours per night means 7 etheric per week, 17 weeks until next DLC, so 119 etheric light before DLC, which is enough to upgrade all the things. Assuming you're a long standing player and were at 32 when House of wolves dropped. I expected it to be rarer, got 11 on week one, and before we go there, I have a full time salary position, that I am also on call 24/7 outside office hours.