Post LDoN Zone info here

[Angelox]

I don't have much memory on how LDoN zones (once you're in), work. I never really played there that much.
I know that the first player in decided what levels the mobs would be (according to PC Level). What I'm not sure of are things like;
Does the same mob spawn (in the same dungeon) and have an adjusted level according to your group? or is it a different mob?
Do all drops change, or just the named?
How many level-groups of NPCs are there in a dungeon?
Any info you can remember on this or anything else you think important, would be helpful for me, and save much time researching.