- Bosses such as Patchwerk are currently parry hasting and old blue post state he would not. With not only Patchwerk but all bosses parry hasting this seems to be a bug and could potentially make certain Ulduar bosses near impossible to clear if the tank busters can likewise parry haste.
This has been posted to github but still has not been addressed after 2 weeks. https://github.com/JamminL/wotlk-classic-bugs/issues/464