There are countless bosses that have invulnerable transitions or phases, and so, you can keep all your shifts and buffs as they were using Anat. Plenty of moments where this happens, so I move to a comfortable position, put my palms together, and once the fight actually resumes, I'm exactly where it all left off. Is that a super-awesome button? God no -- but I actually press it more than other buttons on some other classes, for whatever that's worth.