Used to break strings on a regular basis when I played the (hair) metal stuff in three (instruments + voice) piece bands, late seventies, early eighties, so never went to a gig without the pair, the RD and the PC, then mid eighties Peter Cook converted my RD to fretless, so I'd bring three (a Hohner Jack as the third).
Last regular gig was the same three and post the strip-down of the RD the fretless Jazz... the PC is great for "multi-tasking" having a Mudbucker and a T'bird pup...
Use what you feel is "right" for you, Harry, and trust in the force your instinct and "ears"...