Stamina - Simple. 1 point of stamina is worth 10 hit points. Max out your stamina, you'll have(Cheap WoW Gold) more health, Blessing of Kings will be more effective as it's a flat 10% bonus to all your stats. Your healer will love that you don't go down to 50% every time someone hits you. It's all good in the hood.

Intellect - Simple. 1 point of intellect is worth 15 mana points. The more mana you have(Cheap WoW Gold), the more consecrates and holy shields you can throw around. Not to mention the more heals you'll have access to as well as judgements etc. Intellect also increases the crit % of all your spells including judgements, heals. All very nice. Pallies love mana.

Spirit - All in all, I'm not a huge fan of this attribute. Seeing as you'll be in combat most of the time, and as we have Blessing of Wisdom for those really long fights if necessary, it's bleh, at it's best. Apparently it increases your health and mana regeneration within and out of fights but the actual regeneration rate while fighting is just so pathetic that you'd be better off stacking up stamina and intellect by far. Just my 2 copper.

Agility - Increases your armor. Increases your dodge. Increases your crit chance. Nice attribute imo. Does a great deal of things for you, but once again, wouldn't get too far into it, there's plenty of trinkets and gear out there to improve your armor and dodge rating, make sure you don't sacrifice too much stamina or defense for this.

Strength - I believe my figures are accurate but I could be wrong. 1 Strength point is equal to 2 attack power. 14 attack power is equal to 1 DPS (aka Damage per second) Oh wait, you're still reading... I thought I explained that we did all our dmg with our shield silly monkey?! Strength is garbage, plain and simple. It pretty much (Cheap WoW Gold)bites the dust except when compared to Spirit, in which case it shines like the sunset. 20 strength for 1 block value which basically improves your damage mitigation. But considering 20 strength over 20 stamina is pure madness... and this... is.... AZEROTH! *kicks the warlock into the void.