there a huge different hate gen. between WAR and PLD. as PLD do not have high AOE hate move.
you do not have to shield lob the mob just run in and face pull it. (use Sprint as you will be spamming flash anyway.)

if you gear enough, grab the first 3 pack, then pop you CD to survive. if you got Coerl that walk around that fine if not just ignore him. (you do not need to kill him as you can lock him out of boss room, same way with the plant mob

I usually pop Sentinel first then HG then Rampart...... ( I pop Sentinel first to give healer time to get into position and put some regen on me, so when I use HG Healer can nuke the mob right away ( Holy or w/e SCH have ;P)
the only thing PLD has for AOE agro is Flash, you have to make sure that your flash will hit every mob. spam it till OOM then recharge with riot combo and repeat till every thing dead