I don't know about the pure special sets (except Nasty Plot) because then it is a faster but a heck of a lot more frailer Empoleon or Daikenki then. If you're using it, you might as well go for Nasty Plot since 101 spd is really trolly over 100s and slower but not fast enough to outspeed Garchomp (unless you Salac vrs Haban/Yache Chomp which with Nasty Plot, they can't survive with Yache against Icebeam). Salac and Life Orb are both such great items and Nasty Plot really differentiates it from Empoleon/Daikenki/some other better water poke.
Outside of Nasty Plot, I don't see this being really useful (because then it's just a fast bad Daikenki/Empoleon/Blastoise/etc) although I guess it could do the (okay-ish) Claw Sharpen Hydro Pump thing. Nasty Plot is the real selling point though over other waters since as far as I remember, it is the only water (besides Slowking/Manaphy) to get a massive SAtk 2+ (or more) boost at once except it's really fast and Manaphy would rather have bulk for surviveability and this thing doesn't have much of that anyways.