Prot Pally Looking for some guidance.. please
Dodge and parry are really good for tanks. Having said that, they are unreliable. Stamina is always there. Armor is always there. Go for armor and stamina. Gem for stamina except whatever is required to activate your meta (usually, one stamina hybrid purple in the helm depending on best socket bonus for only 1 gem). It's that simple. Just take whatever dodge/parry/hit/expertise comes natively on the gear. Your threat comes mostly from spec and rotation. After you pass 20% dodge or parry, consider reforging for mastery.
"he doens't need healing, he doesn't need healing, he doesn't nee-WHAOSHIT!wtf was that man!". Please stop leaning on TDR. -Teng