Intellect/Block Value RE
Tanking with Mana-Forged Barrier generally forces players to take the Mind Over Matter epic RE which gives 1 Defense Rating per Intellect BUT you can no longer block, dodge, or parry. If you want to tank higher difficulty content you're forced into this one way of playing MFB. I'd like to see more options available. If you want to block/dodge/parry with MFB you will have no block value because Intellect pieces don't have block value as a secondary stat. What's the point of having a 30% block chance if your block stops zero damage?
To compensate for this, an easy alternative to "Mind Over Matter" would be to create another epic RE that grants you 1 Block Value per point of Intellect. With a full set of Intellect gear and off-pieces this would buff shields enough to have around 70% block value when compared to a Righteous Fury or Defensive Stance tank. It wouldn't make shields great, but the mana barrier can make up the difference on the mitigation!
Maybe call it
"Shield of the Wise"