If you get 2 rings of damage +6, and you've mainly been leveling up your AD & AC then it can be a good weapon. In fact, the higher your AD & AC get, the better the quickstrike dagger becomes.
With the Jewel of Fallhaven, you get 5 attacks, and if you've been to the Prim/BWM towns, you can collect the minor potion of speed (available for purchase if you side with Prim, but some of the monsters drop them too) which gives you another attack if you're using the quickstrike. And that's just in the current version. The next one will allow you to increase your default AP
