to tell you the truth, ive done plenty of CM runs where i dont have to burn though all my mana spamming "Flash".

"Shield Lob" all targets on your way till you are ready to round them up and AoE them down
"Rampart" > "Flash" > "Fast Blade" > "Circle of Scorn" > "Flash" > "Riot Blade" > "Flash" > "Fast Blade" > "Flash" > "Riot Blade"
then from there its a simple ( "Flash" > "Fast Blade" > "Riot Blade") till the mobs go down to manageable numbers.

PLD can easily AoE tank if you know what you are doing. ive been running dungeons where WAR are farting in the wind giving it all they have to TRY and pull HATE from me. Only time someone can out do me if i get the initial hate is if they have a garuda or above weapon which i have yet to get.