Just curious if different sources of level drain stack? Example concept is a Mystic Knight Gish build that has 6 levels of Wizard and invests enhancement points into acquiring the shroud of the Vampire. Shroud of the Vampire gives a level drain on a Vorpal strikes when in melee. Combine this with dual weilding Nightmare the fallen moons with Ruby of Endless night slotted for a total of 1-3 Level drain on a crit and 2 additional level drain on a vorpal. Does it all stack? Anybody Know?