Zealot
1-4 Bleed Stacks on non-Weak Spot Hits.
12-24% Rending on Enemy Weak Spot Hit for 3.5s. Stacks 5 times.
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.
Ranged hits add 1-4 stacks of bleed to enemies.
Contrary to what you see most zealots do in havoc games, Book Zealot can indeed get stuck in and actually kill things. Novel concept I know.
30% damage buff, 10% crit aura, and brittleness marking armored mobs and bosses with bleed is a lot of damage for the team and yourself. Uncanny affects DoTs, a lot of your damage comes from the bleed. Missing a talent like sustained assault isn't as bad as it would be on other weapons.
I pref Bolter over flamer for special sniping and has better ammo eco. But Flamer is perfectly fine.
10% crit aura node is good. 3/4 of the classes benefit from crit to an enormous extent and will help the team even if you don't directly notice the impact.
Also fuck blight spreads