this is how i lvl:
first of all: join 8player games, so u get heavy exp

first lvl until lvl3 in bloodmoor and coldplains

with lvl 3 ask a friend to push u act2 2 hire a merc

clean dark wood, blackmoor, tammo and closter

after that u will be about lvl15

clean catacombs or go sewers until lvl 20

kill ancients, and then with lvl 21 kick some cows until lvl 25

join baalruns until lvl38

go nightmare and let someone push you act5 (while pushing uwill get 2 lvls)

kill ancients

do baalruns until 75

go hell

etc.


with this method i am lvl 75 in less then 3hours