What tackle to use
7 to 9wt outfits. Tippet of about 6 - 10kg is good. Reels will need plenty of backing and should be of LA design to cope with line retrieval when they turn back you with speed. They will make an outgoing clicker sound like a demented cicada.
What flies to use
Surf candies; polar fiber minnows; small clousers; small crease flies; gummy minnows.
Find a bustup or baitball. Match the bait size and behaviour with your fly.
A surface commotion with bait spraying and lots slashing and crashing is your best bet - get your fly in there quickly. Otherwise when you see them lit up and travelling at speed it is sometimes possible to race ahead of them, stop the boat and then wait for them to come onto you with your fly already in the water waiting - a couple of quick strips as the close may trigger the result you want.