Best lines for making traces for edibles would be a good quality Fluorocarbon Hook snood - Double X Fluoro is my favourite, being supple and easy to knot.
For lighter tackle, Siglon make a decent Fluoro and so do Varivas - high quality, but expensive! Varivas is a top worldwide brand, but we don't get it above 0.60 in SA - well at least I've never seen it.
What you put on the sinker side is not that important.
Non eds is steel time... any decent Carbon Coated will do. Fishmate, Sevenstrand, Tooth Proof...