What would you say is the best weapon upgraded with Twinkling Titanite?

Doing another playthrough of DS3, and I am sitting on am ass ton of Twinkling Titanite. I can't decide what to use it on.

Obviously this is subjective, but what is the best weapon upgraded with twinkling titanite?

Doing another playthrough of DS3, and I am sitting on am ass ton of Twinkling Titanite. I can't decide what to use it on.

Obviously this is subjective, but what is the best weapon upgraded with twinkling titanite?