All frames lit at lvl 78 :) It was impossible for me to get a lit frame at low level until I tried the bomb technique.
Last boss: Killed with ~10 lvl 6 pure gems, 6 water traps, and a ton of mana pool. Once you have 6 gems in place, and most of the water traps, keep boosting manapool till 40k ish, then start adding the rest of the gems. DO NOT spend any mana for the last 8 lvls. Setup an armor break (purple) where it will hit the boss on both passes. If you didn't roll at least 1 purple gem, you're screwed. Start over. Not sure how necessary the shock (Cyan) ones are, but they definitely helped.
I don't care what people say, orange gems rock for epics. I had 3 when I beat the last boss, and they drained enough extra mana for him to go around 2x more than when I started. Manapool boosts your score multiplier too, so if you're having trouble getting the lit frame on a level, try boosting mana to something ridiculous like 100k. Try to kill as close to the spawn point as possible, you get more points per kill.
