I add 1% C120L to my American Barleywine, as well as oats and wheat for that thick chewy mouthfeel. If this is a 19C, I think you are way short on hops. I go against most thinking on dry hopping, as my BWs are dry hopped for at least a month, preferably longer. I know people say that's too long, and 5 days is good, but for something that's suppose to age, you don't want so much fresh hop as that little bit dank and resinous flavor IMHO. My last BW recipe was. 1.104 OG, 120 IBU with columbus, chinook, cluster and cascade, and sat on 4oz of cascade for 6 weeks. It's taken 3 golds so far this year, and runner up BOS.