So I like to add scent to new lures or or ones that are out of the tackle box for the first time this year. Pretty simple Procure fish oil spray such as herring or bloody tuna.
https://www.fishusa.com/Pro-Cure-Water-Soluble-Fish-Oil/?sku=216796
I prefer 25# Blood Run Tournament mono for my rigger rods. Straight mono for flashers and I add Blood Run 20# fluoro leader for spoons
Blood Run Sea Flee line
https://www.fishusa.com/Blood-Run-Tackle-Sea-Flee-Monofilament/
My black releases are so tight that a 20# wont release them. I want to be able to see the bite, get to the rigger, release it myself, and reel in the slack. Plus I feel my hook set is so much better that way especially when fishing deep.
So my understanding is you are setting up 2 braid diver reels and you are wondering if you should put backing on them first?
I would. It will take a tremendous amount of braid to fill a 45 series Okuma reel. I would suggest 20- 30# mono as backing. Larger mono such as 50# doesnt lay on the reel as flat. I would also suggest putting on 1000' plus of braid. The mono should only be used as a way "eat up" reel space and will never ever see the water.
As for reel size. Some guys like the oversized reels for divers, such as the 45 series. Personally I use 30 series okuma reels and I spool on 300' of 25# to ensure the reel spool is 100 percent full when I spool on 1000' of ss wire or braid.