this is only semi-truth - for example my hunter is 454 atm - and still runing with 435 weapon and 420 trinkets - why ? because its complete rng whether weapon emmisary will even spawn - and in eu we havent seen one on horde for almost 1,5 month now - same with tortolans - it first has to be their cache - then whther its trinket/ring - and then whether its trinket.
so no its not that easy to gear up in gear that you want via emmisaries alone.