This build focus heavily on physical damage. these build should keep your opponent guessing on which sword that is about to swing. That being said, you should not be too predictable in fighting so you can catch your opponent off guard.
Left hand - Fume UGS,but if it is too heavy then use greatword (the UGS one) or any greatsword but i would recommend the loyce greatsword
Right hand - any straight sword will do but longsword would be great as it can be obtained early in the game.
Fume knight set ( +5 each) but I highly recommend lighter armor like, alva set or llewellyn set
Practice and practice and practice. Learn how to read your opponent, change your attack patterns like switching to power stance mode in a middle of the fight or dual handling any of the sword. Be patient and wait till your opponent create a mistake.