WotLK Ret Pala 1H weap and Shield switch

[jayjaynonkle]

When you pop defensive and switch to str or spell 1H weap/shield (To support your partner or when in duels)
Which shield should I use? :)

Wrathful mp5, crit, or shieldwall?

[Mercy]

Wrathful Gladiator's Barrier. Sp, crit and resilience.