Board Thread:Dark Souls II/@comment-107.171.159.173-20140906202200/@comment-5264386-20140906214503

If you're only using the dagger for critical attacks, you could use either the Shadow Dagger or the Bandit's Knife, as both of them supposedly have some of the higher critical modifier of all base-game daggers.

Given that you have 40 Intelligence and Faith, I'd probably be inclined to upgrade the dagger down the Dark path. However, if you don't want to deal split damage, it's probably best just to not infuse it, as Raw or Enchanted will most likely reduce the Dex scaling too much.

Hope this helps! :)