How would dual wisp projectors stack?

Would I simply get double the charges or would the level of the HoW or SoB summon double? Would the summon be twice as durable? How does this work?

If they stack then two wisps on a skelliemancer ought to make a more durable HoW summon and add to the damage of the skellies.|||Did some quick testing on a mostly naked Barb using two Demon Limb's (lvl 23 Enchant charges on each). Holding one Demon Limb and using the Enchant charge brought his AR to 1810. Holding two and using a charge kept his AR at 1810. I don't believe the skill level of charges stacks or increases. You will just have more charges.

You can't have multiple wisps from a single character. Tested with an Oath runeword (HoW charges) and a Nature's Peace ring (Oak Sage charges).|||Just more charges is the way it seems to work. Will the increased AR work on my skellies?|||Yes, the increased AR will work for the Skellies.