My Jib and main halyards are fashioned out of rope. Should they be wires/cables and not rope?
The jib halyard has to be of wire, as thick as the shrouds but more flexible. It tensions the rig against the latter and carries typically between 130 and 180 kg worth of static load on boats built in the 1980s and later. Older hulls probably flex too much to reach those levels, so you have to settle for some lower value. You still need a good purchase system for it.