First: I would start getting beastlord set, then get desolation (It gets progressively harder, beastlord is from all regular dungeons, and desolation ends at the hardest heroic CoT1 for the chest peice.)
Second: Get heroic purples
Third: Start raiding and grab every hunter piece set and non set you can get.
BTW: I just got beastlord mantle 10 min ago, my group wiped 5 times, probably more, and I thought to myself "Boy my piece better drop" lo and behold it drops.