I actually will take up with the comments about going haste heavy being a bad option. I had been taking the statements that with ascension, 4k haste was a solid amount as fact. Then I noticed that some of the top ranked monks on WoL were running haste heavy ascension builds. I ran this through SimCraft for my toon and actually focused on haste reforging and the gains / losses associated with it and it had a pretty consistant gain in DPS from haste reforging. So, I tried it out. I did a 5 minute run on a target dummy with my current build and pulled about 65k DPS, which was on par with what I was used to. I reforged to a haste heavy build and my DPS went up to 78k and I can repeat that with consistancy. In raids I've seen about a 5-8k DPS increase as well. I know my rotation isn't perfect, I sometimes will delay an RSK by a GCD, etc. but I'd say I'm pretty solid most of the time. Oh, and I rarely feel energy starved and when I do I mix in EB or FoF.
My Armory
I will admit that it could be that my rotation is worse than I gauge it (and most psychological studies on perceived performance suggest it probably is), but ultimately a haste heavy build can be a DPS increase for some.
Long story short, you really have to play around with different reforging to know what works best for you, especially when it comes to haste and WW monks.