Wanheda

What % of haste are we aiming for before loosing other stats? currently I can get 22% haste with my current ilvl of 360 but my crit 16% and my mastery 17%. I have pieces of gear in my bags that can even them out to 19% H. and 18% C. 19% M. I am kinda lost cause my Pong addon keeps telling me versitality and mastery items are a significant upgrade compared to what I have been reading. Please help