thought i would leave my logs here as well. My guild was a little weak on damage the week before on mythic twins so this week i went crane stance. I was healing 40-42k on average in serpent stance, healed 38k in crane with ~10k dps (was rank 48 i believe when we logged it) so you can heal competitively with the right strat as crane.
http://www.warcraftlogs.com/reports/...2&type=healing
i haven't had the same success on most fights, tectus the healing ends up pretty weak (and melee is hell compared to range for healing) brackenspore it's no use not being able to enveloping/soothing mist and kargath there just isn't enough damage to really tell how the healing output is against absorb classes.
Let me know if you guys have any questions that the logs don't easily show!