Summon Carrion Golem

I have a question regarding the Summon Carrion Golem

It's about the mechanism by which the Summon Carrion Golem's damage is amplified by the number of summons surrounding it.

I'm curious if this also affects party members' summons, not just your own.

There's no way to check this in-game or on the PoB, and I can't even check the damage under the same conditions in-game.

The Corrupt Golem gem has a "Surrounding summons <<" check, which determines whether it's your summons or all summons, including those of nearby allies.

a "minion" by definition has to be your own. It is a sub-class of "ally" that is created by YOUR skill.