I was the primary crowd control for 2 years in my dynamis shell. Did whms resist more? Maybe, but the closer you get to capping your enfeebling the less you'd notice this. With full merits and hq most everything, you'll only have to worry about paladins and their goddamn resist sleep rate (and that only in xarc). Whms do have MDB up, so that might skew your results, as might random shells-but then you should either be sleeping mobs the moment they pop, or running them to a safe area then sleeping, in which case they rarely if ever have a chance to buff. The only real opportunity they would have to buff is if you wipe, and if you do, then you'd probably best ES sleepga on your repull anyways.
As for blms in general, any serious blm that didn't just ding 75 should have put significant work into building an enfeebling gear set as well as put some of their first merits into enfeebling skill. Unless blm is not your main and the only thing you do with your blm is nuke HNMs or blow up statues in dynamis, you are going to find that sleep, bind, gravity, and even on occasion blind are incredibly useful whether you're questing, soloing for xp (try that without sleep/bind/grav), doing crowd control in dynamis/limbus/einherjar/salvage/everyfuckingeventever, or even while doing HNMs if there's no rdm available.
Personally I have gear sets for max damage, enfeebling skill, elemental skill, dark magic skill (stun/drain/aspir), stoneskin maxing, and hmp+. Bottom line is that maxing each of these is incredibly helpful if you care about your blm, and anyone that cares should start with enfeebling.
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