[unknown]

Demoman definitely, sticky launcher isn't a subsidiary weapon, it's practically a fuckin primary. Not to mention you can be half way across the map and randomly kill someone with stickies.

Pipes are made for spam, same way you use the huntsman.

Spam + Hidden Stickies + Random Crits = pretty overpowered.

you're doing it wrong.
if you played comp, and couldn't use that sweet-ass sticky script, you'd see why. pipes are really the better of the two, actually.