retri pallys rules for lvling, but when your lvl 70 nearly every pally change to holy.
i don't get why. i have a retri pally lvl 45 and i was holy 40-42 it's really fun but still retri is better for lvl....

Pally change to holy at 70 because raids don't need retri but always need healing, plus pally auras very handy. Leave DPS to classes that are best at it, pallies like shammies are uber-support bots in raids.