Mate try inbetween the Murion Islands. There is a big channel where the water goes inbetween the North and South Island. Use Richters, popper, anything. I went on a sportfishing charter this year, and we went there lost 20fish, i was using softplastics and the mackeral and everything else was biting through the leader. Drift through the  channel. closer to the north island as it is just on the edge of the reefy drop off, cast towards either island, but the north is shallower. We saw a sailfish on the surface, cast a lure and it took the lure. But it snapped the lures back treble and completly crushed the fron treble. I started using the charter operators GT rod with a richter on it, had a massive strike, so i would use surface lures, and laserpro type lures for the tonnes of mackeral.

Ill let you on a secret spot of the charter operators, on the north Island, East side, there is a 2 big sandy beaches, that meet at a point, it looks like a 'bum", drift along the beach there 6m from shore at high tide and cast at the Queenfish, and schools of trevs. My dad, and i both got queenies 1m +, using halco rooster poppers, say 3-4inchish certainly not the huge ones. In blue, and atural colours.

The charter we went on was with On Strike sportfishing charters, they also do game fishing.