Increase the damage bonus from High to Ultra, or even Maximum!
Add a LOW Penalty vs all other monster types.
The way most monster-specific weapons are currently "balanced," they are pathetically weak compared to their rival weapons EXCEPT when up against that specific enemy type, and even then it's a meager bonus at best. The Cold Iron Vanquisher is heavily outclassed by the Leviathan, and the Hunting Blade is severely outclassed by the Vile Striker.
The Cautery Sword, which gets no love at all, has absolutely no use at all, not even in Royal Jelly runs. It is an underused and underpowered weapon.
My ill-informed solution is to greatly increase the damage bonus to the focused monster type, and decrease the damage slightly done to other monsters. This way at least the monster type specific weapons will function as more than just a UV of their rival weapons, and will actually be used specifically for a certain monster type and excell at it naturally, plus have a chance with UV to be good at another monster type as well.
And another thing? Make the damage bonuses more meaningful, as well. Especially for weapons of this nature. It takes nearly a Maximum damage bonus UV Cold Iron Vanquisher to match the Undead-killing power of a non-UV Combuster or Glacius, which is insulting to the weapon that is supposed to excel at killing that monster type.
Perhaps have the weapons handle the damage bonus in a way that has NOTHING to do with Unique Variants.
In my opinion? A Non-UV Cold Iron Vanquisher SHOULD out-class a UV low bonus vs Undead Combuster any day of the week. Perhaps even a UV medium bonus vs undead Combuster. That might just be me, though. I don't know.
Feel free to tell me why this suggestion is stupid. If you actually like it though, please post and make Three Rings aware of a way they can finally make the unloved swords loved again.
Yes please. Anti-family weapons are more specific than damage type (element, shadow, piercing) and as such should provide a greater benefit within their focus, probably on par with the damage increase offered by a fire status effect.
At the very least, I want to see them make orange "hit the weakness" numbers pop up!