Firstly, this is the wrong section of the forum, you should post this in the Halp! section.
Second, I will give you the basic rundown for gemming that mostly everyone is following:
Reforge hit/expertise to mastery, if it has mastery reforge to parry, if it has that reforge to dodge. If you have dodge/parry on a piece, reforge dodge to mastery. Basically, mastery everything, parry if not mastery.