I fished an older Sage Gsh3106LB, brown blank rod, for a while and it is a great rod. I recently switched to a GSH3113LB because I wanted just a little more
backbone. After using both rods, I really don't think there is much difference. Me personally, I wouldn't try landing big kings on the 3106LB, it is just a touch too light and is too difficult to turn them.
I use a couple of different reels with mono only. I have an old school Hardy Silex that is spooled with 20# mono that I use on bigger rivers, due to it's greater line capacity. I also have a bushing Milner Kingfisher with 15# mono that I run on all other rivers.
As far as needing a longer rod to aid in mending, I think that is a misconception. You can actually accomplish a similar mend by keeping your line on the water as well and it will follow right in line with the flow. It just takes practice. One thing a longer rod will help with though is making longer casts. But really, how far do you really need to cast? Casting too far, you can't accomplish a good drift with your float anyway.
It just takes practice and a properly balanced pin. Proper weight under the float is key to a good drift and good casting. It is a blast fighting a fish, but learning to fish a pin isn't the most fun I have ever had. It is actually a bit frustrating until you get it dialed.
Bring your patience to the river, trust me, you will need it at first.
Just keepin' it real.....
Ps....I do not know anyone I fish with or around in BC that use braid or floatant.