using this build will allow you to deliver amazing damage while still remaining agile. while you may not be able to take many hits one to two hits will finish off almost any enemy. using the plus five black knight halberd will allow yo keep enemies at bay to save your health. if you successfully backstab an enemy then use great combustion to finish them as they stand.
finally utilise the dragon stones, harrassing an enemy with the head stone will panic and weaken them for your halberd or pyromancy while using the torso stone at close range will open the enemy up to a lethal strike. i recommend invading in darkroot garden just next to the bonfire( not through the door to Artorias's grave) as this yields rapid summons both dragon eye and soapstone alike.