.....what Mark said
I'll also use 6' straight 20# mono on a floating line if I'm planning on fishing a popper
Ande or Trilene Big Game
There's guys around here that when fishing a rocky area, will just use a leader of about 8' of straight 30# mono and tie an overhand knot in it to weaken it ( I know !)
That way they can dispense with the bother of a separate shock tippet
The simpler the outfit, the more skill it takes to manage it, and the more pleasure one gets in his achievements.
--- Horace Kephart