If the weapon came with the ability to wield it then Setzers cards, because causing big damage with cards is like a super power. Them must be some big muscles.

If it's just me at my current strength, probably one of the guns. Because Im a back row coward who would hesitate if I had to bash someone in the face.

Edit: Healing rods from earlier FFs. The ones that healed people when you hit them with it. Because i dont like going to the doctor. Also so I could help people I guess