I use Amnesia and 35# slickshooter. I've really taken to saying to hell with loops, cut them all off and splice right to the Mono. I want as smooth as a transition as possible between running line and head. Smooth as in I can't feel it running through the guides with a fish on and rod tip up. It always seemed like the knot was hanging up at the tip and if the Coho is running the beach creating slack on that barbless hook, it's goodbye Coho. I'm always riding the thinnest diameter possible for the size of fish I'm after and I know I'll loose a head one of these days, but that just adds to the thrill of the chase. I just think overheading 100 to 120 feet should be effortless without the brute force of swinging a bat. Diameters in the .020 range get me there.
Spey casters do it with longer rods