The biggest thing is to not get tunnel vision on a single mob, because the dps sure aren't lol. As a pld, you want to pop rampart as you gather mobs so the healer won't pull aggro trying to heal you while you run. Be aware the dps are probably smacking the first set of adds, so I typically flash twice and shield lob the one that is getting hit the most as I run up to the next pack.

When you get all the mobs gathered, pop CoS, one more flash and then rotate your RoH combo across all mobs with a Spirits and shield swipe mixed in as well. Use shelltron on cd to get that sweet shield swipe and extra mana. If you see one add dropping fast, give it a little more attention with the sword. Pop a heavy cd if your healer starts to go ham with the holies, gravity, broil, and don't for get you can heal yourself a couple of time during the holy stuns to let the whm go out of mana lol.