I'll have to say Dragonaide is winning THAT discussion so far.
Breezes do NOT heal enough, except for Refreshing Breeze.
Even IF you cast Quickening Breeze (and probably get hit 1-2 times during the casting) and THEN take to the Air and fly straight up (probably get hit at least once doing this too), IF you are not fighting a mob with a ranged attack...
You Might... get back some of your Health and escape with your life. But this brings me to this question: What does the mob do during this time? I assume it just doesn't stand there in battle mode patiently waiting for you to come back down.
My guess, is that it gives up, wanders back to its spawn location, and regenerates is health.
[Edit: Not to mention, It only lasts 30 seconds. That's it. And it doesn't heal all that much. I think, Total, my Quickening Breeze II (I'm Lv44) heals about, roughly 40-50% of my HP over the period of 30 seconds. So IF I took to the air Immediately After casting Quickening Breeze... and assuming I didn't get arrowed/spelled to death trying this stunt, and accounting for getting hit 1-3 times while pulling this off... I wouldn't end up with much more HP than I would have had before beginning the maneuver. So, the ONLY thing Flight does, is gives you a Possible escape route, IF there are no cliffs near you, IF the mob is not a ranged attack mob. And doing so, you will probably lose aggro and the mob is going to regenerate and return to where it came from. You can do the SAME DANG THING with Saris Sprint. And yes, you CAN use Abilities while sprinting. Sprint until the mob is about 15m away from you, pause, use Instant Heal on yourself, keep running. You can't even do that while flying, mind you.]
--Dhalin