AOE boosting with prot pally for dummies ?

[Moorea]

put 2 points in pursuit of justice so you can run faster

is pursuit of justice with 2 points more on foot speed than a speed enchant or same (what about 1 pt) ?

[Simulacra]

is pursuit of justice with 2 points more on foot speed than a speed enchant or same (what about 1 pt) ?

I'd go with 2 and put +stam on your boots, you can really notice the difference in speed - I'm not sure that putting 1 in the talent and then having a speed enchant will stack.
edit : just checked - no stacking. Plus you get 50% reduction in disarm.

Top tip I got from a thread here a long time ago: When pulling the instance don't run, strafe instead, this way your shield will block attacks from behind and the mobs will also get struck with the poison spores from the shield . It's the best aoe tanking shield I've seen, this method works well in SM.