i think there is only one club truely better, but it drops off an Nm that appears on the ship to Selbina/Mhaura, high atk les delay, and more stat boosts, tough, its only truely soloible by a whm/nin or mnk/nin 75, so that, like kraken club is fairly unrealistic to most, if you can get either what im talking about or kraken my hats off to you
this is a nice club yes, the best for whm. kraken club is very week. the only use i can see for kraken club for a whm is for skill up. as well as a whm/nin sub kraken club for fast tp and use the darksteel maul as main for more DMG on your WS. yes your skill is what makes your attack strong. but trust me use the kraken club and then the darksteel mule and u will see a big dif.
As far as Kraken Club goes, I would NEVER mainhand it for anything but fun/skillup. It makes a good sub for building TP I suppose, but if you're soloing I wouldn't use it unless the mob you are soloing has very weak TP attacks (crabs, for example.)