For the early season fast growing tender mouth kokes that throw and tear out hooks so easily, I use Diawa Ultralight Spinmatics with 4lb test mono on the small Ticas.
Also been using for the last 2 years and still testing a 13' 6" Aventa center pin ultra light rod with a float reel and 4 lb test mono for max stretch and less strain on the soft mouths.
Surface trolling, none to less than 2 oz of weight
Use the soft action fiberglass Jareed Johnson Specials for regular season down rigger trolling.
Used my 8 ft med action G. Loomis GL3 casting steelhead rod and 8 lb when I was fishing Wallowa Lake for the big one, glad I had the heavy rod for the 6 lber I finally got, they're fat slow slabs that use their sideways force to fight with. No current in the lake to give them muscles but they just don't quit, keep pumping that big tail in a circle slabbed sideways to the boat.