Mythical Maw of the Damned - clearly meant for some kind of Ritualist / Cabalist S&B melee. If there was a Shield WPS that raised the WPS pool for this class, this might be pretty neat. But what’s with the Blood Boil bonuses? How does that help a melee fighter in any conceivable sense?
Hyrian’s Bulwark - Shield Nightblade! Yeah! Seriously, why are we promoting Shield Nightblade as a thing when Dual Blades gives you multiple good buffs and access to DW WPS?
The Grey Knight - Cooldown Forcewave + Judgment? Warlords have around 200 things that are better than this. The other skills bonuses: Heart of the Wild and Mark of Torment - are entirely useless. Shaman has no Physical RR to really make it worth it - especially since you’re not doing 1H + Shield Savagery, and the Necro bonuses would better help a WPS combat Oppressor / Death Knight, not a cooldown caster one.
The Epic shields I’m not really going to touch as the only reason you’d use them is for patching up resistance holes until you get the good stuff.
I wanted to also make sure this thread on Shield WPS outside of Shattering Smash isn’t ignored.