info of area levels:
https://forums.d2jsp.org/topic.php?t=93056943&f=87The area levels are not something that strictly needs to be followed, but you could use them to get a general idea.
Nightmare Mephisto is level 59 and the first area of Act4 is 56. If you get too far outside the level range, you will have a hard time hitting the mobs (if you are melee) and your exp will suffer.
When playing solo, I generally enter NM around 43 then spam Countess runs for awhile. After I build up a nice stockpile of useful runes, I've gotten enough exp that I can move through the rest of NM without worrying about level.
This post was edited by Kayeto on May 26 2022 10:40am