MJC· Junkyard Spey
I have only cast the next size down (13'9"-8/9) of your rod. I would pick a short head spey line. A multi tip if you can spend that much will give you a great deal of versitility. In the short head length the "jedis" call for 575grns to 650grns. For me the Kispiox rods are on the slower side action wise so I would stay on the lower end of this range.