I'm having issues with doing Strat on my paladin and could use some extra information.

Raid Holy spec, T4/Badge prot gear (with the Sporregar shield) is what I have for it. I tried Strat last night and could do 3 groups decently easy, but doing a 4th caused me some issues and I never could get down doing 5 groups at a time. Will going prot really be that big of a help for me? Also should I just go 0/49/12 or do a 0/40/21 for sanctity aura?

Edit: Also, I don't have a figurine, is it worth it to farm that trinket up?

Thanks