Tank in the making

[Sarcatica]

DRK and PLD are preferred more in the Main Tank group mostly due to the procs you can get, you lose the access to the procs if you have DRK/PLD as the OT. I consider both DRK and PLD better at taking damage while pushing DPS in Grit-less or in Swo due to the amount of on-demand CDs you have to cycle through tank busters (in endgame contents, you will keep hearing this phrase), WAR will generally run out of CDs if you stay in Deliverance for the long amount of time VS DRK/PLD tanking. WAR is best used when your group plans out specific time of tanking before swapping to be effective in the CDs cycling instead of having 1 fixed job do the whole tanking for the most part.

It's also generally accepted that WAR is the best OT due to the utility the job can bring to raid comp (and the huge DPS and burst), much like how NIN is almost auto included. So you currently have DRK/PLD as the "MT" and WAR as the "OT" in the best and ideal raid comp.

PLD and WAR are the 2 tanks that need to pay attention to their Offensive CDs (FoF and Berserk), maximizing damage on these 2 jobs requires in-depth knowledge of the fights, much like how the DPS roles should think. How long is the fight? How many FoF/Berserk can I fit in the duration? Do I use FoF/Berserk now or should I keep it, and for how long? Will the boss jump for a long time? Are there any adds to get the most total damage (aka padding ehehe)? On the other hand, DRK is the controlling job due to how Darkside (drains mana time to time for 15% up damage), you are always adjusting to how much mana you ideally want and how to maximize your damage primarily through your mana and your excess amount of oGCD to weave into your combo.

All in all, it's all about how much you are able to milk from the jobs. Skill > gear by a long shot.