Clarification on PLD = Main tank WAR = Off tank

[ReiszRie]

PLD has greater access to skills that reduces damage taken making it easier for healers to heal through and at times, allowing a brief respite for healers to deal with healing the other party members.

(Rampart - 20% damage reduction, Bulwark - 60% increased block rate - Sentinel - 40% damage reduction - Shield Oath - 20% damage reduction 20% damage output reduction, Hallowed Ground - Invulnerability, Awareness - Prevents critical damage)

WAR on the other hand has high HP, better mob control and higher damage output but noticeably lower damage mitigation thus requiring healers to stay on their toes in order to heal through the damage received by the WAR.

To the WAR, it might not seem like a big deal as their HP is constantly replenished but it does make a healer's job more difficult especially at higher level content where they need to attend to other party members.

For the above reason, PLDs are more suited for tanking main hard-hitting bosses.