I built that blank and it depends how you want to fish. I built mine to fish down and accoss, somewhat large flies and sink tips. I tried a few different skagit lines and found a Rio Skagit Short 375 grain line to work best for this rod. I use it with Rio MOW tips (the light ones--T-8). 400 grains was too heavy for this blank, IMO.
If you're going to use this rod in a nymphing capacity with strike indicators, my line recommendation above would not be the best choice.