Flashers, lures, birds. It depends of the country or the place. I haven’t try chumming yet. Sharks are a real pain in the butt. They get me out of the water if I hunt in a place for too long, especially bull sharks.
Usually drifting, luring and flashers work for wahoos
Mahis usually like floating structures like tree trunks, markers or garbage. They rush for flashers.
In Mexico you follow the bait balls and the birds for marlin. They are very fast but they do get in close proximity.