Fishing in Northern Australia can be very demanding on your tackle and when targeting large fish with quality threadlines capable of running very heavy drag it is important that your terminal tackle is up to scratch.  On a recent trip to Broome we used heavy duty jigheads with galvanised 5/0 hooks and 2 ounces of lead.  To this we matched a white 7 inch Slam soft bait.  Don't lose fish due to straightened hooks - you are only as strong as your weakest link.