I've been seeing alot of hate for this ability, and also alot of mp issue comments, so maybe this will shine some light on something you havn't thought of.

I've done all the dungeons, lvl 60 etc. In the final two dungeons with i145 gear it can be quite difficult, especially if your tank is i145 also. And then you hear many people saying we dont have things to manage mp well. Well this spell can help that alot.

Just try this before judging, in diurnal, put aspected benefic + aspected helios on tank, time dialation, celestial opposition, bole if you have it saved, then collective unconscious. 38 seconds of regen, 50 seconds of the aoe regen, and 18 seconds of CU. At my current i154 this is doing 1800 a tic!! For that 18 seconds you can pull 5-8 lvl 60 mobs, stand up, go get a soda, come back, and the pt will still be at full health even if all the aoe's have been hitting you.

Now of course this is from a MP conservation stand point, when you are sittin at 3000 mp and the mobs still have half their hp and your luminiferous is 30 seconds away. Obviously if you have the mp to still heal and dps that is preferred. But It saved my butt multiple times with low geared tanks in neverreap + the fractal continuum.