Thanks about the info on the survival combo for warriors. Are you sure about Block only being for Warriors?!
Because:
Yesterday I purchased an epic orb, and it had block on it (why would that be possible if it doesn’t work for wizards?)
Before that I jaspered a shield with block to orb and equiped it. The increase of damage reduction (shown in the Defense tab) translated 1:1 to the block rate on the shield.