[Sandman]

Oh, I just had a nasty vision - Conscious exploitation of this effect - Mass production of slave matrixes and Communion matrixes, a few items (Fire shield, cloak of invulnerability, air shield, Boots of Stone, Crystal Shield, maybe medallion of vengence, et cetera) placed on several masters (mages (or non-mages, even) with Crystal Matrices), who then just hang out in the back (or even retreat), while the communicants (cheap scounts with Slave Matrices) charge. Imagine facing down an army of even 20 such slaves - all of whom have charge body, mirror image, fire shield, air shield, invulnerability, etherial, quickness, ... who can be replaced at a cost of 10 Earth, 10 Astral, and either 20 gold (scouts) or a few gems (cheap commander summons, such as the Black Servant). Maybe they aren't full fledged SC's, but they would sure be effective as thugs. It would even be possible to get extra effects in there from the masters casting spells - one casts Astral shield, one casts Astral weapon, one casts Summon Earth Power (for the reinvig, not the +earth), one casts soul vortex, one casts Pheonix Pyre (for the kaboom if someone actually manages to kill one) - at a cost of one combat round for both the masters and the SuperScouts.
ugh. Nasty.

Slave matrixes don't work on non-mage units. At least it didn't when I tried this tactic. Might work on priests, though.