Quote Originally Posted by Aurelius2625 View Post
Please go to The Balance FFXIV discord for serious answers on this topic, as well as the actual math and facts to back up their claims. You won't find a serious answer here.
Looking through, they do actually have an answer which is neat. Under the #tank_resources section, there are two omni-sets, one at a 2.38 GCD and one at a 2.42 GCD.

The 2.38 GCD build has two DH melds (Earrings and Bracelet) which PLD, DRK, and GNB can keep while they recommend WAR swaps those out. The 2.42 GCD build has five DH melds (two Weapon, Head, Earrings, Necklace) which PLD, DRK, and GNB can keep while they once again recommend swapping those out for WAR. Actual BiS is obviously going to differ for each Job, but the omni-sets will work well enough even if they are weaker.