I currently have a dual Disc/Holy spec. Either spec is fine for heroics (I always use my Disc spec for them, since I much prefer Disc).
However for raiding I've always been asked to go Holy, but I'm hoping that will change soon (especially after the patch) and I'll be raiding as Disc sometimes. I will almost certainly still have to go Holy sometimes though.
Anyway, I therefore want to try to have two viable specs, and the question arises: What are my best stat choices if I want to play either spec?
I'm pretty sure that I start with INT > SPIRIT. But then what?
Disc values Crit quite highly, but Holy not at all. Normally, Disc doesn't care about Haste, but Holy does. However, Haste can also be good for Disc if you go for it instead of Crit (I think?).
So what I think I should do is:
Int > Spirit (until mana not a problem) > Haste > Mastery > Crit
This saddens me, because I'm effectively optimising for Holy at the expense of Disc, but I think if I ignore haste I'll be really crap at raid healing as Holy.
Does anyone have any thoughts? Is there anyone else out there who raids as both Holy AND Disc? What do you go for?