I’ll keep it short. You can access nightmare dungeons as you finish the first capstone dungeon. If you then clear the nightmare dungeon, you could upgrade your glyphs, but there’s error text saying you have to be level 50 in order to upgrade glyphs. In addition, I haven’t seen any glyphs drop either. I know paragon is only unlocked at level 50, but glyphs don’t need to imo.
Why are glyphs gatekept by level, when you can access the content they drop in before said level?
You do not want to even begin level glyphs before nightmare dungeon tier 40+ the glyph xp before that is just joke. I usual just begin level them up at world tier 4.
The reason is the lesser i can be in nm dungeons the better. It’s the worst content in the game, so it’s about level those glyphs as fast as possible. And that do not happen before tier 40+