I fish pike waters frequently. Including an annual camping/fishing trip where it's common to catch several hundred pike a week. I got away from steel leaders years ago. When I'm targeting pike, I run a 40lb flouro leader. When I'm targeting walleye or smallmouth and know I'll be getting into some pike as well, I'll tie in a 12-20 pound flouro leader. A 20lb flouro leader will hold up to pike just fine, but it won't last as long as 40lb. I'm always checking for knicks in the line and if I see any I'll retie a new leader.
If I was throwing an expensive custom swimbait around pike waters I'd be very comfortable using 30-40lb flouro as bite protection.