The principle of build is to stack full the Combo Counter, to have very high damage from [Blood Rush] with basic attack and corrosive, and do an Heavy attack on the most resistant ennemis, that will use 10% of the combo.

To have the 90% efficiency, this build need Zenurik Inner Might.

Use the 2 melee arcane ([Fury] and Strike) will make the build mush more efficient.
Arcane Strike is near indispensable and make us 60% faster ; Arcane [Fury] will increase the damage of 60%.

The corrosive is good to kill ennemis with armor, because it ignore 75% of the ferrite armor and make 75% more damage to it, so it make near 7 time more damage to the greener of the steal path.

The [Reach] is not optional, increase the range make this weapon much more pleasant to play, and make possible to kill a lot of ennemis in one hit.
The dagger have the highest (0.9) [Follow Through] of all melee weapon (except exalted), making the damage penalty after hinting lot of weapon in 1 hit very low. as exemple, the 5th ennemis take 66% of the damage of the first target. for a sword, that have a [Follow Through] of 0.7 (average for the melee), it would only be 24%.

If you don't need the combo duration (as exemple, because you use the aura [Swift Momentum]), you can use [Life Strike] for the survivability.