So shamans wouldn't "seriously" need it? Both shamans and paladins use magic spells and heals. The paladin has stronger heals, but the shaman has stronger spells but.

I think this would be, by far, the best Elemental, Restoration, and enhancement shield. As an enhancement shaman, I treat my healing and damaging spells as equally important as my physical attacks. I should add that restoration and elemental shamans often benefit quite significantly from spell crit.