most people stick with mono for billfish..if in a club they use pretest line to comply with gfaa and igfa we fish for fun now and use braid with a 70mtr topshot of mono it gives a stretch factor which negates the violent headshakes and jumps..braid has nil stretch and fished straight to trace can be very hard to stay tight to a beakie.... I personally have copped a couple of floggings when they jump close and shake there head..still fun but not advised for newbies...good luck with the new outfit,,rick