http://compendium.ddo.com/wiki/Feat:...Ki:_Long_Sword
Now, even if that's not put in ever, a 12 kensai/8 monk would still get +18 on a critical and +10 non-critical damage modifier swinging a q-staff. Along with all the level 6 monk benefits.
That's before any other bonuses or damage multipliers.
Theoretical max damage bonus for a q-staff swinging kensai/monk with a double madstone rage would have a 49 STR, that gives a +19 modifier, two handing offers double that, +5 power attack bonus, +5 weapon bonus, and you're now doing a
base 58 damage per swing. Do the math for a critical and you're now doing a
base 132 damage on a critical.
That's with a big friggin' stick!
Throw in 6 rogue two monk, and you just get even more ******** with your weapon speed now coming in to play with acrobat PrE's with out adding in the rogue sneak attack bonuses.
I don't think people have thought this through completely on why combining monk is a bad thing with Kensai.
Edit: After calculating the STR, I'm still missing plus 3 from enhancements, so it's a +21 modifier with a 52 theoretical max STR. Upping the damage output even higher.