I ALWAYS use a leader. #savethenanofil
with braid I wanted a built in weak point, I don't like tying direct on something they might study before biting, and I wanted to conserve the braid.
Nano though thin is not crazy high break strength, but I don't want to burn through it.
I tie in 6 feet or so of P Line CX premium. 4 or 6 lb. if I'm feeling fancy, I'll use an Alberto knot. If in a hurry, I'll use a three turn Surgeons knot. It O want to hear a knot bumping in the guides, I'll tie a uni to uni.
No one has ever explained to me why I need to use fluro for my leader. Fluro is picky about the knot so I stick with a copoly