I have the Hardy Swift 11”6 #7 and I use a nextcast winter Authority 35 ft head 475 grains line on it. It’s a peachHi Neil,
I've moved some rods out over the years and will only comment regarding what I own and use. My very best caster is only 11 1/2 feet in length but can fish as far as my longer rods if or when I need the additional distance. I can only guess what the same rod may do in a 13 foot or longer model.
So what is the favorite rod? Hardy Swift Mk 2 using a 37 foot Beulah Elixir integrated line. The rod is marked #7 and the line weight is 475 grains. This is the rod I use most because I think it is the best of what I have in house.
When fishing for the kings which can be large experience has taught me to us either my Sage One 13 1/2 foot #8 or the Sage X 14 foot #8. Both of those are good rods but if forced to chose only one it would be the Hardy Swift.
I also have a Winston #7 rod in 15' that I will use on the very largest rivers but it is heavy. Casts well and will cast far but heavy.