I disagree, there are too many mistakes, just for the tank portion.
1. For Warrior, he said DH > TEN, which is wrong. Almost 50% of your overall damage comes from IR and Inner Chaos. Thus, DH is completely worthless for ~40-50% of your damage done. It should be TEN > DH. There are no SkS numbers which would be more interesting... which should be between 1015 and 1624 (2.43s - 2.37s)
2. Speaking of SkS values: Those for GNB and PLD in the video are also completely off. He is right, that GNB has a great variety, but fails to give a good example, and misses the right numbers.
2.1. If you want to play 2.47s-2.46s GCD, you just need 609-710 SkS, but that build has a special rotation which generally misses 1 GCD in every 2nd No Mercy window.
Your usual GCD for GNB should be between 2.43s and 2.4s (some builds go even faster, but those are either fight specific or to "fight against your ping"). For these GCDs your SkS value should be between 1015 and 1320. I have no clue where he gets those ~900-1100!?
2.2. For PLD he fails to mention that 814 (acutally its 812) (2.45s) is the ABSOLUTE minimum to hit 11 GCDs in FoF PLUS you can't have any interruptions, otherwise it's not worth. 900 SkS doesn't even change the GCD tier, while 914 does!
Again, your most common GCD for PLD is 2.43s-2.42s (1015-1117+), sometimes even down to 2.38s (1523+) for specific fights like E6s (Garuda + Ifrit).
Going for 2.45s-2.44s on PLD for general gameplay is just bad advise!
3. My last pick on BLM (I would want to do others, but then my post would be too long...): His advise is to go for comfort SpS then CRIT... You don't go for CRIT as BLM unless a. you get a sh*t ton of it and/or b. it fits with your party comp. If not, you go for DH >= DET after SpS. In general, CRIT is the lowest priority stat for BLM. I really wonder where he gets his information from...
All GCD tier values taken from AkhMorning
@Topic: ItMe posted what's relevant. Rin Karigani is probably one of the best tanks out there and knows his stuff, he also cleared UCoB with a full tank party. If you really need more (and reliable) information, I recommend you visit the Balance discord!