At the risk of side tracking the thread, I don't think your approach is giving you a net benefit overall, at least when taken to the extremes in the way you did on that first boss.
Here's a comparison log from the full Ala Mhigo who's clip I linked above. Have you got a log for your run? It'd make for a good side by side.
Whilst I took liberties with Raffter's HP, I generally kept the rest above 50% because that's just my cautious nature so if you've got a log for your run there it'll make for an interesting comparison. I suspect I would have thrown more heals and generally been less efficient than you on this front. However I'm wondering if my aggression with mid pull dotting combined with chasing all the GCDs was enough to make this up as I've always felt that these two factors were what made my dungeon DPS as high as it is despite being a little more cautious than some.