I meant which of Bahamut/Ruin 3, Upheaval, or Kaiten is an animation lock.
You have exactly one, Primal Rend, which has a 30 second window it can be used in, and can be used anytime under the 2 min raid buff window when aligning it, and is naturally aligned to it based in Inner Release's CD, which has no preconditions (no gauge requirement to use it or etc) and is naturally aligned with all burst windows by using it on CD after the opener. When you use Inner Release, if it's a bad time to use Primal Rend, you can push it as much as 30 seconds. That is, Primal Rend is arguably far more flexible than Crimson Strike is. Oh, and WAR has 3 other gap closers that are oGCD and not tied to anything other than a natural CD, meaning they can be held and used when needed without requiring any part of the rotation. WAR has the most gapclosers in the game, and the most flexibility in their use.
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EDIT: Yes, you can argue that you can hold Ifrit's Favor for up to 30 seconds as well, but only if you actively stop your overall rotation (don't use any additional Summons or Demis), while WAR can chug along its rotation happy as you please until it finds a good time to slot in Primal Rend.
