it could be a pike but it could also be an eel which have teeth at the back of theeir mouths and can easily get through line. what bait are you using when this 'mystery fish' is snapping you?

if your sure its a pike then try a small deadbait ojn the bottom as and eel will also take a small deadbait.

yes you will need a wire trace but you can tie it as you would a hair rig with the same lead set up.

give it a go....you never know