A kensai is good for fighting hand to hand,(you know,fighting rangers and paladins of the sort) dont bother with gauths and mindflayer type stuff unless his inteligence is atleast 16 or he has a mage backing the kensai up.
And yes, i got to the Suldenasser place with a kensai and was practically invulnerable, my guy could rip the crap outta everything. But for some reason, i quit the kensai before i won cuz it was to EZ!!!
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Coffee anyone?