I've got my Ludwig's Holy Blade up to +6, which says it scales B with Strength, C with Skill, and B with Arcane.
However, whenever I have the option to level up and I see what the affect would be of leveling up Arcane, it doesn't show an increase in weapon damage. It does, however, if I level up Strength or Skill.
Is it a bug that it says it scales with Arcane when it doesn't seem to, or am I missing something? And for this particular weapon, what's the best strategy for upgrading stats to maximize damage? Would I want to get Strength up first, and then Skill? If so, is there a soft cap on skills like Dark Souls had? What attributes should I be shooting for?