If you’re planning on raiding in 4.0.1 and your guild is looking to push progression then there are a couple of tidbits you need to know.
The first crucial number for you is 1015. That is your new haste cap you should strive for at level 80. The way the math works you need 37.5% haste to get a 6th tick of rejuvenation (a 50% increase to the base spells output). Any less than that and you only get 5. Assuming that you have a shadowpriest, moonkin, or shaman caster in your group that translates to 1015 haste rating. If you are in a 10 man raiding guild and for some reason lack all three of these then I am sorry but you are squarely out of luck. Due to diminishing returns I don’t think you can expect to reach the full amount of haste strictly through gear without hurting yourself.
What this means is that you’ll really want to take advantage of reforging to gain haste on any items that you did not have haste on before. Now, most druids these days are running 4 piece tier 10 and some 4 piece heroic tier 10 so you will have a handful of crit pieces for sure to reforge. I am one of those “weird” druids who doesn’t run any tier 10 at all (I think I have too much of an issue with the set bonus RNG factor) so I will be looking elsewhere for my reforging. It doesn’t matter how you reach the cap, just that you do.
As of right now, and until anyone proves otherwise Swift Rejuvenation the talent is still bugged. The way the bug works, if you place only 1 of the 2 points into the talent it overrides your haste rating (making it not affect Rejuvenation’s GCD) and sets the GCD at 1.25. With 1015 Haste rating, raid buffed, your GCD on Rejuvenation should sit at 1.09 seconds. I’m still a little unsure if the 2 talent points in SR is worth dropping the GCD from 1.09 to 1.00. For heroic fights it might be as I still believe Rejuvenation will be integral to our healing game plan but I’ll need further testing. I still recommend reading my primer if you haven’t already though this update to Swift Rejuv. supersedes what I have written there pertaining to spec.
EDIT: I’ve removed the section on Malfurion’s Gift because I changed my mind on it enough that I would never suggest it (and multiple other people have affirmed that notion). What this means is that you are more than likely looking at one of three specs: 2/3/31, 2/0/34, or 0/3/33
Given the fast paced nature of ICC I have a hard time eliminating Nature’s Swiftness however a magic dispel is not high on my priority list. I’ll more than likely toy around with some specs moving forward but Malfurion’s Gift is not going to be included either way.