Is there anything HP water hits harder than HP ground? other than Aerodactyl I cant think of any.
Anyway, in the last few weeks, when i've played, i've been playing with a Scarf Tentacruel. I dont know if it's very creative, but it's unusual and no-one expects it.
Tentacruel @ Choice Scarf
252 SpA, 252 Spe, 4HP/Def/SpD
Modest/Timid (I use Modest with Scarf, Timid with Specs if I ever use it)
Ice Beam(/Blizzard in hail)
Sludge Wave/HP Fire
HP Fire is used if it isnt on a rain team, if you dont use it however Ferrothorn with wall you badly.