i started at level 1 in penitent, i found just going minions, with decompose with acolytes decompose superior as the range is greater and the corpse production is fantastic for keeping up the heal on minions plus resurrecting them when they died… and of course it also offers vuln which is not reliably available that early otherwise.
despite my doubts about this season, at least the leveling process has been a lot of fun so far.