As a tank, and only if you plan on hitting savage, first aim for 650 accuracy without tank stance/food, that will carry you through a5-6s. Then at least 560 skill speed, after that as much crit as you can, supplement with det.
I do believe you on this. I've played alot of MMOs endgame but still am still learning a bit in FFXIV. Is there some math or numbers you have by chance to show why this is? i.e. 650 accuracy grants +10% hit and we have by default -10% hit? Apologies if this is obvious in someway.

Also, I'm playing DRK as my main, is 560 sks the same target for WAR and DRK? Sounds like PLD prioritizes a bit differently?