Auras on monsters raised by a friendly Arch-Vile may affect the player.

[argv-minus-one]

In my current game (Hell difficulty, Dark Zone event, in which the Shadows have already arrived), I have a summoned Arch-Vile going around raising friendly monsters for me. This is rather awesome, but for one problem: I noticed one of the monsters it raised had an aura that was stealing EP/ammo/money from me, even though it was friendly. I could see the pop-off numbers indicating which one had the offending aura, too. I killed it, and the stealing stopped, like it would with a hostile monster's aura.

[argv-minus-one]

I also notice I can't walk through monsters my Arch-Vile raises, and Rally doesn't call them to me. On the other hand, they do receive the friendly monster aura.

Not being able to Rally them is not an issue in itself—you could just call it a downside of using a summoned Arch-Vile. I'm guessing it's related to why their (harmful) auras affect me, though.

[Silentdarkness12]

Same thing applies to lost souls summoned by summoned Pain Elementals/Nightmare Elementals.

Seems that summons' summons are not given any sort of control by the player. It's a shame.

Although, seeing as how a hard limit was put in on summons, I can see how allowing that would be a nice way to break all the things.

[argv-minus-one]

I've also noticed that summoning an Arch-Vile tends to crash the game after a while, at least if there are lots of dead monsters for it to raise. Maybe summoning an Archie just shouldn't be available at all?

[Silentdarkness12]

Probably too many summoned monsters at once.

Maybe a hard limit on summoned Archvile monsters.