unfortunately those are not based on ingame armors
the mistweaver is based on pandaren lorewalkers conceptart from wow
the brewmaster is based on a more "samurai" type of armor (kimono, the leather armor and the hardened platings on top)
the windwalker is based on tiger muay-thai gear from movies. I just liked the concept of focusing on a light armor with plated gauntlets and boots due to the focus on punches and kicks.