This build should be pretty viable on paper. It focuses on dealing heavy damage through buffs. You can swap out the Balder Side Sword if needs be for a thrusting sword such as Ricard's Rapier. personally, I like using the Balder Side Sword because it is essentially a spear in disguise and it is also fast. The armour is based upon which gives the best protection/cosmetics for the right weight cap. This can also be switched to something lighter if you want. A MLGS could also be viable for those seeking an additional ranged option or a heftier weapon. Grass Crest Shield is used for stamina regen but this can also be swapped out for something that offers better defence, such as a Bloodshield.
This is only the basic skeleton for the build. The choice of covenants/items/further levels is entirely up to you.