With how much variation in the gear and how almost any item of gear can drop in any dungeon, it's hard to make a BiS list, and then go get it. If you are looking for BiS, get stuff that has has up to 750 rating if you have the 5% haste buff, then Multistrike after that. For Neck, cloak, rings, and some trinkets, I would get spirit on those. Once you have the haste to 750 just focus on getting the most Multistrike you can with mastery. With how gear is set up it's hard to get items, but I'm 636 ilvl already and starting to Min Max gear. I don't DE the gear now.
If you have any questions of concerns you can message me on here or find me on my stream at
http://www.twitch.tv/saltyclamslive
GL in your gear finding.