I like dwarven fighter/clerics
With max constitution they have pretty good hit points, and with the cleric buffs available can become one hell of a tank.
Hammer of choice is Crom Faeyr, ranged being the Dwarven Thrower. (Always put two points in hammers

)
As for your Kensai->Druid idea, well, it's less cheesy than Kensai->Mage. [img]tongue.gif[/img]