I use 6lb test mono to tie my leaders with ... then wrap a bunch of those pre-tied leaders around a section of Pool Noodle. I tie a loop knot on one end of the leader and a jighead to the other end. I tie a Improved Clinch knot on the jighead.
My main lines on my long rods are 17-30# test mono or braid... with a duo-lock snap or swivel on the end of the main line to hook the loop knot of my leader into. Barrel sinkers are on the main lines above the duo-lock snap .... and on the rods with a swivel I can attach different size weights and push the loop knot thru the bottom eye of the weight and then run the jighead thru the loop and pull it closed.
As long as your leader line is a lighter pound test than your main line, chances of the leader breaking first are good.