My point is that with 1.7K HP you give Healers a window. Yes, its a small window, its still a window. Its a window for your Off Tank to react. Its a window for anything to happen. Its a window between the Breath and the next Meele Swing/Ability the Dragon is going to use. If you're dead, there's no window at all.
Where did you get 1.7K HP from anyway? There's various different Gems, 81 and 83 Greens, 85 Blues. They all have different Stats. The more you gear up the more Sockets your Gear gains as well. I doubt you're also taking into account Raid Buffs. BoK - +5% Stamina. That 1.7K as you dismiss it is buffed up by Raid Buffs, and can turn into much more than 1.7K.