Crystal/Slave Matrix. Are they worth it?

[Corwin]

Endoperez said:
Master Matrixes surely are. They can be used to make a non-astral, non-blood mage lead a communion. Slave matrices are more expensive, but I could see using two if I have only very limited access to Astral mages otherwise, or would quickly lose them to Magic Duel or something. I wouldn't make too many of them, though, perhaps just enough to boost some mage 1 level for some important spell, so 2 slave matrices.

I disagree. Slave matrix can be very useful for the "reverse communion", especialy in the mid-late game. Imagine a few Powerfull SC chasis each wearing a slave matrix(among their regular battle gear), with 10-12 buffs from all schools of magic casted on them by few Communion master over the first few turns of battle. Then masters retreat, and SC "slaves" attack, easily tearing through everything that desperate opponent tries to throw at them.