If you really want to go crazy with the Pigapult then your best option is probably So'mer for encouragement. You will also want to take Scion of Black Blood to remove the Concussion condition from using stuffed piglets as well.
Add in Sparks for fast means that you could have a crew of 5 stuffed piglets, Pigapult, Sparks, Scion, So'mer with Encouragement, Slop Hauler and a couple of Bayous. It will let you do 2 focused shots or 4 normal shots per turn each with extra if required from Encouragement.