A simple Dex build using the Mirrah greatsword two-handed. Really just my old build from Dark Soul except i used the flamberge in that game. Faith is optional. you could just as easily use a pyro or nothing. Biuld worked well for me in Dark Souls so I set out to recreate it in DS2
Mirrah Greatsword +10
short bow or black bow
priest chime or pyro flame
elite knight leggings
but you can play around with the loadout to get your desired poise/weight/def
Sunlight blade or gold pine resin
To use the sunlight blade you will need to use skeptic spice to bring down the faith req. not necessarily worth it. you could just use pyro or no spells. if you use no spells you could put attunement and faith points somewhere else and use gold pine resin or the resin of your choice. the build is pretty flexible. this is just what i've had the most success with.