Hmm, I wold say DRK, is the most in Depth AOE rotation.
PLD is:
Physical phase: (Total Eclipse > Prominence) > Spell Phase: (Req > Holy Circle (x4) > Confiteor) then fit Circle of Scorn in between GCDs.
You can't buff spell phase with FOF, so beyond that, your AOE spam will be (Total Eclipse > Prominence) with FOF when available. It's an easy AOE rotation. The only other thing you are juggling is your Defensive CDs.
DRK has a similar pattern with a 2-step AOE combo (Unleash > Stalwart Soul), and a high damage 5-hit spam (Quietus) with Delirium (similar to PLDs 5-hit spell spam). Beyond that, DRK should be using Salted Earth's dot damage which is only 5 ticks and you can definitely get 4 if not all 5 ticks in before the mobs die in high end dungeons. So that's an additional 300 potency per add. Then there's Abyssal Drain which is 200 potency per add WITH a heal, so very valuable in large mob pulls. Any additional Quietus are Gauge spenders, not MP spenders so you still have Flood Of Shadow to spam on all adds for 300 potency per add. It's hit box is very expanded so even though it is considered a "straight line" AOE you can still hit adds beside and behind you. Lastly, there's Blood Weapon which restores Gauge and MP at the same time.
So imo, I would say DRK has a lot more depth going on than any other tank job as far AOE rotations go :)
