Healing melds..

[Kaurie]

If raiding in Savage and will contribute DPS: Accuracy to cap

If Scholar: CRT wherever possible, Spell Speed after that

If WHM/AST: I would recommend SpS>CRT

I would not recommend DET.

Explanations:
Accuracy: Healers get no accuracy on equipment, if you are DPSing in savage, you'll waste a lot of MP
Critical Hit: Scholars get a bonus of a double-shield on Adloquium that crit's. Spell Speed does not affect your pet, so Crit bumps up to more powerful for your pets heals as well.
Spell Speed: This is both the best stat for upping your heals and upping your DPS as a caster (only reason SMN favours DET is because the attacks by your pet count as auto attacks and SPS doesn't help them, otherwise SPS > CRT > DET for all casters DPS)
Determination: This has very little benefit to casters, especially healers. It will more predictably up your heals than a CRT, but the difference is something like... with +200 DET you will have a 50% chance to do 1.5% more healing power, and with +200 CRT you will have a 4.5% chance to do ~55% more healing power.
Piety: This is great for progressing through content, but most healers have a lot of Piety on gear and have lots of skills to get back their MP. However, a "sweet spot" sort-to-speak is at 16k MP, where MP regened per tick = MP cost per cure/phsyick.

Sources: Various testing through 3.x, discussions on /r/reddit with other healers testing, discussions on sub-forum healers with other healers testing, and with a discussion with Dervy

PS: My fairly rough stat weights (IIRC) are:
Scholar
WD: between 6 and 9
MND: 1
CRT: 0.3
SPS: 0.25
DET: 0.08

WHM/AST
WD: between 6 and 9
MND: 1
CRT: 0.25
SPS: 0.3
DET: 0.08