Farm solo + Kormir (NPC) = less drop?

Hi,

I'd seen posts saying that summons, such as Legionnaire Charr, lowered the drop rate, as did heroes. I haven't seen anything official about this and was wondering if Kormir, as a pnj in a co-op and not taken into account in the group window list [P] could also lower the drop rate. What about it?

Quote from Sudi

Afaik only party members affect drops, heroes are such, but summons/npcs are "allies" therefore they should not.

As for an invocation, it's in the group window under: allies (whether allies influence the drop remains to be seen).

Here, Kormir is an ally, but he's invincible and not in the group window. Hence the doubt about allies in the group window and allies outside the group window.