Silks. pvp stuff is a dime a dozen on the AH already. I bought maybe 2 patterns just to max out tailoring, and then made the robe/gloves, then saved all the rest until i got the bag pattern.
I bought all the pvp recipes. I can sell 1-8 per day, on weekends the most ive sold was 46 items. At between 80-230g profit per item they were a damn good buy.