Best faith weapon, hands down. Straight swords are already pretty flexible weapons, so one that puts your faith investment into PHYSICAL attack, while it won't compete with the A and S scalings some weapons get with heavy or sharp infusions, is pretty useful. However, the Weapon art buff boosts ALL damage by 10% AND stacks with weapon buffs. So with 60 faith you should be getting about 365 AR with the straight sword alone (minimum dex and strength), and a Dark Moon Blade buff cast with Yorshka's Chime will add about 235 magic damage for a combined total AR of 600 AR. Toss on the weapon art buff of 10%, and you now have a 660 AR straight sword for 45 seconds. Enough time to absolutely annihilate a boss. Or put an enemy down in 3 hits in pvp.