Interesting that most of you seem to be pulling with PLD. I guess it makes sense with the current link patterns that don't really reward picking away from a distance or chaining an area, but I miss good fun DD pulls.
I'm not actually, I'm playing a WAR. Giant axes for life
PLDs have better raw mitigation, WARs have better self healing/healthpools and a bonus to incoming healing. Warriors vs Death Knights, kind of.
Another small but important difference - PLDs have an on-gcd stun with no cooldown, WARs have an off-gcd stun with a cooldown. So more frequent but less reliable interrupts vs more reliable but less frequent interrupts. Both useful, just in different ways. PLDs also get shield swipe later, though that's slightly different.
If the "combo effect" doesn't state "increased enmity", you're most likely better off spamming skills that have enmity and occasionally padding that with the damage dealing skills if you feel like you have enough aggro.
To address this last point, you don't actually have to do any guessing or feeling at all - get into a fight with a single mob in a party, lock aggro, then look over at your party list.
Next to everyones name is a small bar, how filled that bar is shows exactly how far up the enmity table they are compared to you, and it even ranks them by number.
You can also look over at the mob list panel and it shows a color indicating how much hate a given mob has towards you.
The first lets you see exactly how you stand on enmity with any given mob, the latter lets you tell if you're in danger of losing any mob in a pack to a party member.
I find it easier to use those if you move them around on your screen, but I wish the enmity information could be separated entirely to put above your healthbar/below your feet. It's still handy. If you see you are miles ahead on threat on a single target boss, go into your heavier damage rotation/burn cooldowns to increase damage.