I'm curious to see this be put into an experiment: to truly know if healing is that useless in dungeons. Basically I would like somebody to record them and their friends running a lv.90 dungeon or trial synced with no healer.

One where it's only the tank and 2 dps.
Another with a tank and 4 dps
And lastly one run with regular party make up.

Oh and to also have each run timed to see which party was the most efficient in clearing the content.