Hmm. I main War, and find timing Inner Beast for Death Sentence more challenging than simply using tools off the global cool down on Paladin. But to each their own. I generally find the GCD can work against ya on abilities like that, because they aren't instantaneous. If your cycling through refreshing the ability, it may be too late to get off "Inner beast" However, Sentinel/Rampart/etc are single button pushes that ignore global cooldown.

Though when tanking Ifrit Ex, who does pretty consistent damage, I prefer Warrior. I appreciate your opinion, maybe it's my playstyle that leans me to disagree.