They can only use swords and daggers I believe...
If you use swords LS weapons guide says to go 75/25 (str/dex ratio), however, the base 50 dex works for me and I just put all into str. Get yourself str armor and charms if you wanna be high dmg, or high ee plate and life charms if you wanna tank.
As far as weps go the basic idea is this, if you use a wep with a low min/high max dmg you want to get the highest str possible to boost your min dmg. If you use weps with high min/low max dmg you wanna use a lot of dex to boost the critical chance and dmg.