All Fluorocarbons are desgined to be used for stiff or semi stiff rigs the more supple ones are designed to be used if the bottom is a not quite clean as due to fluoros natural stiffness it can sit up on uneven bottoms, its a selling feature that fluorocarbons are invisible in water but that only applies in the more clearer waters as its the light penetrating it that makes it invisible, if your lake has choddy or silty bottom then it collects debris an becomes slightly more visible.
For bottom bait rigs it works best IMO with conventual D style rigs rather than a conventional hair style type of rig.