Daggers? They aren't exactly a heavy attack weapon but enemies hit by a Heavy Attack from a dagger are opened up for Finishers, assuming they aren't finisher immune. I forget if their heavy attacks come with a forced slash proc.
I just wasn't sure if the heavy attack multipier was any good on daggers. I do like modding them for finishers, you end up getting access to certain buffs like Arcane Trickery/Ultimatum that you normally don't get with most builds.