Real world, I'd take either Enel's lightning, Kizaru's light, or Doflamingo's strings.
Doflamingo's strings are severely underrated in this thread considering it's only been mentioned once here
Ito Ito fruit maybe. Who knew strings could be that versatile.
Yeah, with that fruit you can:
- create fully functional and fully automated indistinguishable clones.
- create an impenetrable, island-sized cage of impenetrable strings that can even block electric signals. Can also just use it for personal defense
- stitch up injuries (internal or external) of various severity
- motherfucking "fly" through the sky like you're the cartoon spider-man.
- use the strings to "skate" on essentially anything with great speed
- use the strings to basically cut through anything from essentially anywhere within dozens if not hundreds of miles.
- and whatever else
Swiss army knife of badass is what the Ito Ito fruit is. Practical in so many different ways and scenarios when thinking real-world or just One Piece world.