1) While offtanking Stone Guard, my own self heals accounted for over half of all my healing taken. This includes EH, Gift, Colossus procs, and Chi Waves. Specifically, since I was sitting off on my own, my Chi Wave bounces were completely used on me and provided a good bit of healing per use.
2) On our kill of Feng, I spent most of the fight without aggro (phase one I was the Nullification tank, and phase two/three our MT just got lucky with some avoidance strings). Seeing as I had nothing to do and the raid was looking a bit sickly, I ended up setting into a rotation of TP spam (or autoattacking), and Chi Wave -> Keg Smash to ensure I was always at max chi while weaving in Waves.
The results on Feng were staggering. With all the vengeance I had and the extra Chi I had to spend, I ended up pushing out 16k HPS. Meanwhile, our healers were hovering around 30-38k. I had Chi Wave healing crits for upwards of 150k per bounce while I had the boss' attention.
Has anyone else seen these types of results? Seeing such great "free" healing makes me value haste even more -- I would love to be able to weave in Chi Wave as often as possible while still ensuring decent Shuffle uptime and low Stagger.
Side question: About how high are you guys Purifying at? I've been ensuring to clear it any time it goes over 8-10k/tick (I believe this is right near the Light/Moderate border), and popping an extra one in there whenever my Shuffle looks stable enough.