Zealot
45-60% Finesse Damage for 2s on successful Dodge.
12-24% Rending on Enemy Weak Spot Hit for 3.5s. Stacks 5 times.
Ranged hits add 1-4 stacks of bleed to enemies.
Target receives 1-4 Stacks of 2.5% Brittleness on direct projectile hit. Debuff lasts for 5 seconds and can have a maximum of 16 stacks.
If your team is lacking on boss dmg, this tree helps with that while still maintaining book. Its uptime will not be as much as backstab knife, but it's the trade off for more boss dmg. Build works with pretty much any ranged, Flamer/Bolter recommended.