kama- 1d6 20 X2 -exotic weapon proficiency-
sickle- 1d6 20 X2 -simple weapon proficiency-
seems wrong to me.
i know in pnp, kamas add bonuses to trip, and probably have some other benefits i'm not aware of, but thats obviously not the case in ddo. overall point, kamas should either be 1d6 18-20 X2, 1d8 19-20 X2, or 1d6 19-20 X3.. anything less than that would be at best a martial weapon.
handaxe, finessable, 1d6 20 X3
rapier, finessable, 1d6 18-20 X3
short sword, finessable, 19-20 X2
all martial proficiency, and superior to kama's
there it is, flame away