Does Anyone know
 

Suppose:

Shaman1-4 have slave matrixes
Shaman 5 has a Communion Master, and an eye of aiming.

Will the slaves get the benefit of the aim?

Re: Does Anyone know
 

Pretty sure the eye provides an item bonus, not an auto-cast buff.

Re: Does Anyone know
 

You can tell whether it's an auto-cast buff or an item bonus by looking at your unit outside combat. If you see the effect outside combat, it's not an auto-cast buff.

For example, wear Copper Plate. You see the SR immediately, but there's no Charge Body until you head into a battle.

Re: Does Anyone know
 

any 'Onebattle spell' effects that only target the master will target the slaves, so for example having a Lantern shield that casts corpse candle as onebattle spell does not make all the slave equally cast the spell or gain the benefit of it (makes sense, right). Effects that only affect the 'caster' (ie. the holder of item) transfer to slaves. Copper plate is one of these, as vfb said. There are some items that I have no idea if their effects transfer, most being artifacts (like Armor of Virtue returning, which is set as onebattle spell).

Re: Does Anyone know
 

Virtue is AoE 1, not caster. So it doesn't hit the communion slaves, but it does hit anyone who remains in the wearer's square in the first turn of the battle. Also note that the wearer does not get the Returning effect if he moves off his square in the first turn of battle!

Re: Does Anyone know
 

What other items provide boni that could be transferred to slaves?

Re: Does Anyone know
 

Only items with non-BE/BF, non-summoning, caster-targeting OBS:

Copper plate, as mentioned above.

Bell of Cleansing: Not sure if this is a caster effect. Maybe.

Crystal Shield: I'm pretty sure you'll get PoTS on the slaves with this one.

Sandals of the Crane: Yes! Insta-blink on the communion, woo hoo! :D

The Black Mirror: Grants Disbelieve. If that's AoE 0 on the caster, slaves get it too. Not exactly anything to go crazy about.

That's it, I think.

Re: Does Anyone know
 

I suspect the effects would go in slot order, so armor before misc.,. So copper plate would be cast before the communion master.

However, interesting idea

Eye of the void lets you dispel illusion.
Equip crystl matrix, eye of the void, script blinkx5... wonder if you could end a MoD that way...

Bell of Cleansing lists itself as the castor....

Re: Does Anyone know
 

They don't go in the conventional slot order. Matrix + Crystal Shield works just fine, IIRC.

Re: Does Anyone know
 

Yeah, I doubt it'll work. Same would be with spirit helmet and Scutata Volturnus then, and quite possibly nethgul/carcarator