Personally, if you are going to run leader… I go with heavier braid like 30# (off brand). Skip the backing and just fill the spool up to your leader. No down side to it. If worried about the braid slipping on the spool, use some tape on the knot and first couple wraps, then fill er up.
Keep in mind if pulling boards, you may need to consider what snaps you are using to attach to braid. It sucks dropping a board and having to go get it in rough water with a number of lines out.
My walleye only smaller reel rods have 12# Big Game mono on them top to bottom. I’ve used these for everything… walleye to coho salmon.
Other rods w braid, I have used off brand braid (fraction of the cost) 30# for every use…. be it inland or Erie walleye or salmon on the big pond. No need to use light braid in my mind. Example, no one I’ve ever talked to on any Erie thread runs light braid either.
150′ isn’t enough….. say you have a crank 80 behind a board, out 70 from the boat – doesn’t leave you anything on the spool.