if you are casting floats with mono , it would be best to have something close to 7 ft and a bit stiff , like mentioned for long range hooksets . those that say soft hooksets are key to ketchn crappie are mistaken in the approach to loading the stringer , just saying .
short whippy rods tend to fail with mono at any distances , the rod bends too much and do not transfer the energy needed for a solid hook set as the line stretch occurs.
this was learned by me and my reading EVERYTHING I could find fishing related WAY back when around 50 years ago . There was a bass fishing article I read with multiple tests done at different distances and it was amazing the amount of loss of energy the further out it got. Some of the hook point actual lbs. per square inch versus the angler's hookset were difficult to fathom, if you will .
so in the end when see some fool out there really rippin his rod, ( like a pro bass angler ) float fishing way out there , remember this >>>> it might be me .....
disclaimer time : I only go to set my hook like I mean it and feel the rod load up with a fish ,so I might be somewhat biased in my opinion