For steel like 6 or 8 lb test on the noodle and bout the same for leader on the fly rig in winter- use a 5 wt in winter on the fly rig.
For early Steel like to up the leader a bit cause Hos and late Kings are still around and the Steel seem likely to be harder fighting before winter sets in- stick with a 9wt fly rod or 8 wt switch then as well as the noodle with 8 or 10 on the spool.
Kings -for me- require bout a 14 lb line on the rare day I use a spin rig in average to high water conditions. Started with 10 wt fly rods using 12 to 14 leader and now am down to the 8wt switch or 9 wt fly rods with about 10 to 12 lb leaders -depending on water conditions- low waters can sometimes find me with even 8 lb Drennan leader on the fly.
We are mostly all a bit different with these things but don't think there are many 25 to 40 pound, #1 hook, 6 ft salt water bunker snagging rod guys here- lol.
Would strongly suggest that a beginner use the 14 for most everything- these fishes fighting capability will come as a surprise and adjusting to it takes time. Likely why many started with a 10 wt ugly Stick and progressed to other styles later. Hooking and loosing all your fish can make a lousy first trip. Also can kill everything ya hook playing them too long trying to make up for being under geared for SR fishes- they aint your garden variety.
Just as important as everything else will be a reel with a great drag- stuff they will sell you ( even on many heavier fly reels) will burn right out and a strong smooth drag is a MUST here. Ya certainly wont need Salt water spin reels but a great drag and lots of line capability. Wouldn't think of having much less than a hundred yards of backing on the fly reel. When a bigun turns in the rapids and heads for the lake youll need it.