Will fluorocarbon stand up to a pikes teeth Lee?
50lb + should be ok. If I were fishing somewhere snaggy then maybe 100lb. There are a few doubts about using fluorocarbon traces. The main of pike I've caught on the fly haven't been deep hooked, unlike using bait where more of the line comes into contact with the teeth.
With thick fluoro you can easily check for damage should you catch a fish or any problems such as trees etc fluoro is pretty tough gear as long as you keep your eye on it.
The only bite offs I had is where I've been fishing for trout with lesser breaking strain. eve