Over the last year or so I have been casting a line too light for my spey rod. Since I was not sure what I was looking for and since the rivers I seem to fish are smaller than most I bought a TFO 12.6 ft eight weight rod. I have been using a 6/7/8 windcutter lines with it. Although I can cast the line decently, I seem to be using my shoulder too much. What line would you guys recommend me getting for this type of rod? I was thinking about a Skagit 8/9. What do you think?