In the Temple City of En'Kilah in Borean tundra there are these blood globes within the necromancers temples. They count as NPC's rather than objects and offer weapon skillups
I spent a few minutes just autosmacking them whilst i made a cuppa tea and made a good 200+ skill on staffs using them.
P.S alot easier if u play a non melee class as u tend to hit for jackshit with weapons so it takes a good few mins to kill them :P