How about a physical set?
Sure Clawitzer has better special attack but a physical set could be fun and unexpected.
Clawitzer @ Life Orb/Leftovers
EVS: 252Atk 252HP 4Def/SpDef
This set is sure to surprise some people as Clawitzer is usually a special attacker. It has access to crabhammer which is one of the best (if not the best) physical water move in the game and with swords dance, it makes for some great fun and reactions from people. Aqua jet is a good priority move for cleaning up and rock slide is just good in general. Sub can be used for setting up swords dances and hiding behind.
Chuck on a life orb and you are going to do some serious work. Or you could run leftovers and sacrifice that extra damage but get a few more swords dances up.
NOTE: THIS IS A FUN SET
Here is my normal set
Clawitzer @ life orb/choice scarf
EVS: 252SpAtk 252 HP 4 of whatever you want
Well first of all, why no dragon pulse? well ice beam gives better coverage and I think that you don't even need dragon pulse. It doesn't cover against anything that ice beam doesn't. Plus ice beam hits grass types hard. Some people run scald but I like water pulse for the troll confusion and also for the mega launcher boost - its slightly stronger than scald after mega launcher boost.