Ninja Ambush, but I think a formula for that has been found already.
EDIT: You'd be better off using Shadow Web on bigger monsters like Skelegons. Plenty of sniping spots, more EXP for the same amount of time, etc.
EDIT: You'd be better off using Shadow Web on bigger monsters like Skelegons. Plenty of sniping spots, more EXP for the same amount of time, etc.

