Not sure i have all the answers but i have tried and use several flouro options.
i make leaders with 80 abrazx using crimps. Those have a coastlock snap on one end and a swivel on the other. I haven’t had one fail and they hold up well; i worry about hooking a musky since most folks go heavier there. I really like being able to grab the heavy leader when landing a fish. This is my pike rig for trolling and spinnerbaits; i have caught tons of bass too.
i also have 40 sunline leader with an fg knot (it took lots of practice). That is 4-5’ long and i connect with a sd jam knot. The sunline handles much softer then seagar blue and ties nicely. This my main rig for bass and pike and haven’t had a pike go through this yet. I retie after each pike because i can feel nicks in the line.
i also have seagar blue in 40 and now 50. I could never tie it reliably and so use crimps. I will add a 10” leader section to a hook, like for a paddle tail and then tie that to my main line. Mastering the fg makes this less useful but it works too.