James, if I want to throw big heavy flies(within reason) on sumpin other than a skag. I pick the spool w/the winter authority 55 on it that corresponds w/the rod that I have in me mitts at the moment. I throw a WA55 8/9 on a MKS-LS2 and two other stics with a 8wt rating. 8wt rio tips 3-6-8 on this line do the trick on 13' to 14' rods for me. If I have backcast room for the day, my first pick is a WA 55 9/10 on a 15' 8/9wt MKS. I will throw big truders and a bunch of running line on that setup . The WA 55 has much more massive shoulders on it than the FF or WA 70 does.