None of the above!
You could actually have added this question to the other thread on leaders
If I use a Shockleader for maximum distance casting I use either Amnesia or Drennan Greased Weasel.
If I'm not using any then I try to fish as Slack a Line as possible, have tubing pinned down (if I'm using any), or get the Mainline down to the bottom. Just by fishing Running Leads with a Slack Line and possibly a Flying Back lead you can disguise the last of the line near the lead
Would the fish not be able to feel the back lead when they pick up the bait.
I am seriously considering a running lead setup with slack lines.
What is your detection like on slack lines?