The project to create our own predator leader began in spring of 2020 after loosing my PB pike due to a bad knot tied by one of the name brands. It wasn't the only time we lost fish due the that same knot failing. After most of a season of testing different wire and fluorocarbon combinations we have come up with our Pro-Drift Predator Wire/Fluoro Leader featuring Knot2Kinky single strand titanium wire that won't easily kink. We combine 1.5 feet of wire with 6 feet of fluoro and back the knot up with some UV glue to get our 7.5 foot leader. Comes blank at both ends so you are free to choose how you want to fish. We prefer to tie a loop to connect to our Pro-Drift Predator Line's welded loop then to the fly using a 3 wrap clinch knot with a long tag end (video link at the bottom). This is all we use now.
Be careful when handling fish as the wire tag ends are very sharp.
Video of recommended knot: https://www.youtube.com/watch?v=E0L63ykK6zI