Its april 2016 yet no healer stat weights???

[Granyala]

Spell Speed It takes a lot of this to become useful to reall be noticeable. I am at I think 600 SS with 2.47 CD or so. Like every 100 SS you get a -0.01 seconds off your GCD- Say you had 1050 SS, that's ~ 700 from the default which should give you 2.38 seconds GCD. That means every 36 casts you will get a free heal. In terms of saving people, no one should be that close to the brink of death that 0.07 seconds means clearing and not. Spell Speed does however affect your potency on your HoT. I think the effect of this is similar to DET, but as it also lowers you recast time this is more desirable. For my calculation, 100 SS = 0.01 shaved off a 2.5 GCD which means your added healing power is 0.01/2.5 + HoT potency bonus.

Added Healing Power (100 SS): 0.4% without HoTs, ~0.8% with HoTs

Critical Rate and Severity For every 200 Crit, you have a 5% chance to crit more and a 0.1x modifier. As the modifier is in question, I'll leave this out of the calculations.. The added healing power is then (Chance x Added Value) = (5% x 1.5) = 0.05 x 1.5 = 7.5% added to your healing power.

Added Healing Power (100 CRIT): 7.5%

Now, yes, crit is unpredictable, but the added healing power is 18.75x greater for CRIT than DET.

Your data is flawed:
Spell speed: reduces cast time by 0.01s for every 26.5SS (according to the data earlier in this thread).
So 100SS/26.5 ~ .0377 reduction of cast time.
(2.5-0.0377)/(2.5/100) = 98.5% of cast time. Roughly 1.5% faster cast times. A.k.a. 1.5% more throughput.
Add to that the HoT bonus which I cannot calculate right now but I think you'll easily end up in the 2%+ range.

Crit: 200 crit = 5% chance -> 5% * 0.5!! = 2.5%.
If it doesn't crit you would end up doing 1.0 instead of 1.5. Calculating each crit as an ADDITIONAL 1.5 is wrong.
A modifier of 1.6 would make that a 3% gain.

Sadly I do not have any data for DET.

Something seems off though. According to this napkin math, SS would have double the value compared to crit per stat point. So I do think source data is questionable.
DEVs aren't stupid, they will balance the secondary stats somehow.

Another thought: someone mentioned that 200(?) ACC would add 20% hit chance. Depending on our base hit chance this stat has the chance to outclass every other secondary by a whole order of magnitude, making it the best stat even if it does nothing for the healing. (not sure how important healer DPS is, as I do not raid high end)

I have to admit though: getting sub 5% performance increases for putting in Grade Vs in all of my slots is woefully ... underwhelming. :/