The problem is that, as you well said, it seems impossible. But it is not. It can happen that you are paired with a DD whose gear surpasses yours, and that's where tanking gets tricky. Sometimes they will just need to hold back no matter what you do. But this case is not what's being discussed, since it falls more on the category of DD self-restraint and less on the PLD enmity generation.
Like others said, having an up-to-date weapon has a great deal of impact on your enmity generation, so focus on that first.
My two cents regarding AoE tanking: Provoke (if, and only if the mob I want is unreachable with shield lob and i don't foresee the necessity of using it for the next 40 secs), Shield Lob, Flash, Flash, Flash(If there is going to be AoE dmg),Halone Combo on target 1, Flash, Fast Blade>Savage Blade target 2, Halone target 3... And so on. Add some Flashes between skills here and there for increased AoE generation if it is still a problem. Once the target being focused is below 20% start skipping it in the Halone rotation..
Suggestions or corrections are most welcome :)
