Healed Chim as disc and didn't want to punch a baby while doing it. I did some getting up over 10k but did a lot of double tank healing and Feud healing. Coordination on Feud CDs made a huge difference from other attempts.
Using FH was weird.
Drinking at home. But I could probably stand to get laid.
For that fight, even as Holy, I've found that I can use FH on every heal and not worry about going out of mana. In addition, as Holy, this has the added benefit of Serendipity, which makes Massacre's all that much easier and efficient to heal.
I've been able to use Flash Heals successfully both on normal and Heroic.