I have been planning to use 20# fluoro this winter after reading about it over the last few years from Doug Stange. I chose to go with fluoro leader material rather than line because it is formulated and processed differently resulting in more abrasion resistance (the drawback being that it also stiffer and more expensive). Maybe the leader material would help your, or you could consider 25# or 30#. Also, Stange probably changes his leaders frequently after inspecting for nicks. Here are some relevant quotes from Doug Stange that I have referenced:
“Quick Strike Rig Pike” (2015) – “Stranded wire is still a great choice, particularly on lightly fished lakes, though Stange ties rigs on 25-pound fluorocarbon when targeting jaded gators in heavily fished waters. “Twenty-five pounds is just right for deadbait,” Doug Stange says. “Fishing livebait is a different story. I drop to 20-pound fluorocarbon for livebait, especially when walleyes enter the mix along with pike; but at that point I’m usually fishing a single hook and not quick-strike rigging. Again, livebait’s a different subject. And for giant pike at late ice, I always fish wire, because there’s a chance to get bitten off with fluorocarbon. But it doesn’t happen often. Indeed, in more than 8 years of fishing it I’ve never been bitten off. But it could happen.”
“Factoring Pike at First Ice” (2014) – “It’s worth noting that I now have many seasons under my belt fishing with fluorocarbon as a leader below most of my tip-ups without ever being bitten off. I began fishing with 30-pound, quickly dropped to 25-pound, and switched three years ago to 20-pound. Fishing the 20-pound I’ve landed fish as large as 18 pounds and probably iced over 100 pike. I still use 27-pound Sevenstrand wire as leader when fishing for big fish at last ice. There’s still always a chance for being bitten off when using lighter fluorocarbon.
The relatively light 20-pound fluoro is particularly important at first ice, because livebait is the standard at this time, as opposed to deadbait sets which predominate during midwinter and at late ice. Rigged on a single hook, a medium-sized livebait can swim actively to attract the attention of pike. The 20-pound is significantly more supple than 25-pound.”