We use nylon double braid. In the Southern Hemisphere, you have to get the supplier to order it specially for you. We do not use chafe gear
on ours, want to be able to inspect it after each use, and we use larger diameter than is usually recommended (so there's some line left, should it chafe).
You should be able to use octoplait, but I would definitely use chafe gear
with it if you have a known chafing spot. Those kevlar cloth sleeves seem to be really good.