250 skill, actually. At least, that's when the Alliance gets it ^_^
Finding patterns isn't really hard until you get to the final ones. The level 300s are almost all drops, unless I am mistaken. Plus, they all require Mooncloth, which as a 4 day cooldown for one piece (and they all need multiple). On the plus side, the level 300, 55+ Mooncloth armor is awesome. I'm going to compare it to the item sets and see if I want Mooncloth armor or a bottomless bag (18-slot) :-P