[chrispedersen]

hence my question about the # of slots.
Slave collar gives -5 MR.
Void eye gives -2 MR
Banner of the Northern Star gives -2.
Magic +3 as well.

so if you have 3 slots, and if you reduce down to 2, and if you can recover the slave collar, this looks like a pretty effective way.

Ie., Banner + slave collar + Magic 3 = MR of 8 or less for a lot of units.