does not work all that well plus they have to be really good mdps for this to even be part of this plan. yes i have tank this and see the epic fail mdps try and the rare "good ones". and the best ones still force the tank off the center at some point usually its 35% hp on the boss or before 99% of the time and this is even with guild mates.
You not only have to be "good", you have to have a perfect link between your computer and the server, and an empty server helps too.
I've had 3 second lags on these, with a highly variable lag during the whole encounter (almost from 0 to 3000ms).
Anyway, it's ok if you place your bubbles on the barbecue or in the corners of the center platform with only 1 mdps.