Unless you're a flosser the only reason for more than 3 feet of leader is that fish in clear water conditions are shying away from your your shiny swivels and lead. The more leader the more control or touch you lose.
Use black swivels and aged lead. I like to soak my swivels, rubber and lead in freshwater over nite then let them airdry. takes the shine off. If you use rubber tubing then use black. For leader use the smallest diameter you feel comfortable with....in most situations you probably have plenty of hole to play the fish in. The only time you need heavy leaders(more than 12pd is when you have space and structure handicaps). Try flourocarbon if you want...some like it ...I'm not a fan yet. You'll also find fish shying away from those fancy shiny expensive hooks in heavily fished waters. Consider using black, bronze or gray finishes.

Cove RV Park & Tackle Prostaff(1)
Always FishOn!
Gooose