What tackle to use
Fast sinking lines or shooting heads that will get the fly down deep. Smaller fish up to 20kg can be handled with a 10wt rod, any larger than that and it's 12wt as a minimum.
What flies to use
Baitfish profiles, chum flies, squid immitations
Create a chum trail using 'cubes' of sardines that have been cut up. It's important to keep the trail going with a good rule of thumb being that once you can no longer see the last cube, then it's time for another.