For mono line I use either 8 lb. Maxima or 10 lb. Izorline for steelhead plug fishing; because the thinner diameter gets the plugs down better with less line out. And you can follow the fish with a boat to make it easier to land fish on lighter line.

For chinook I prefer using 30 lb. superbraid, for the same reason of getting the plugs deeper due to the smaller line diameter. And the 'braids are stong enough for the nooks.

RT