Regarding the damage you're taking, that's quite possibly because you have fairly low damage mitigation for a tank.

Here's my prot pally : http://eu.wowarmory.com/character-sh...=Melchi%C3%A1h

Granted you're fighting mobs 20 levels below you....but as you won't be bursting them down quickly in a prot spec you'll be wanting a more damage reduction.

As far as your spec goes that seems ok.

For boosting I don't often use sacred shield unless it's going wrong as it stops ret aura from working. When I've made my pull I just drop a consecrate and use my macro for standard 969 rotation. If you don't know what that is, do a quick google, there's tons of info out there about it. I of course have divine plea up (as well as it being glyphed), blessing of sanctuary and seal of wisdom. if it all goes pear shaped and you need to heal...pop sacred shield, concentration aura and start flashes of light.

Well....that's how I do it anyway.......other people might have different takes on it.