In Blasted Lands there is mobs named Servant of Sevine, when you try to kill them their hp stop to 1%, after the immune effect the mob start getting dmg normally again, so with these mobs you can just put your character auto melee attack to this mob and go afk, you get weapon skill from 1-350 simple by being afk, the mob doesn't hit so hard so if you're 70 lvl you just need to come back to first aid & eat like every 10-15 min.
my first real post so don't flame