Less visible...Yes.Mono over flouro? Depends on what TYPE of presentation/lure.Remember, braid floats, flouro sinks,mono floats.
For pike, i would go with flouro, for its abrasion resistance.I would also use it for bass, if you are using plastics or texas rigging, because it sinks.
Mono would be a good choice if you are using surface baits, because of its ability to float.
But Ya, it should work fine for ya