Fluorocarbon leaders - Beaver Dam
I carry some light wire steel leaders when fishing for pike with the kids, other than that I have a spool of 50 lb braid I use when fishing for pike. If the water is stained I often leave these on for walleye too and have pretty good luck with them. If I am fishing clear water for walleye I switch over to 10 lb fluorocarbon.
Use good hooks and keep them sharp, use good swivels if you're using them. Check the line after catching something for nicks / rough spots, change the leader if in doubt. Sometimes I will put beads and a blade on or just beads. I like to mix and match and adjust to what the fish tell me they want.
I stopped using wire leaders years ago. If I am targeting big pike, I use 30lb fluoro, haven't had any issues landing big fish. For walleyes, I scale way down and use 6 or alb fluoro. This can be a problem if a big old pike comes along, but I think the lighter line is critical to catching walleyes. Just buy a spool of 30 and a spool of 8 and make your own leaders.