Here is the set up that I use. I like my prawns to spin when trolled.
This is a very simple set up.
Small in line beads
Plastic clevis. Metal will nick your line and there is a good chance of losing a fish.
Size 3 blade
3 hook sliding mooching rig in 3/0 = 2/0 combination. ( note the stinger hook out front).
Small dental rubber bands tp help secure the prawn to your rig.