Author’s note: I have quit playing World of Warcraft before patch 3.0.5. Content in this article is unlikely to be relevant anymore and will not be updated.
I added two new columns to take crits into account, as well as the Healing Light talent. You can now play with these values accordingly, and if these don’t match the average heal value displayed by DrDamage, my formulas are definitely wrong somewhere.
I’m at work though so I can’t check it out right now
The spreadsheet is here.