Anoint in Blood, Backstabber, The Emperor’s Bullet, Dance of Death.
These four talents are highly situational, and three out of four of them are about ranged weapons. And yet, all four of them lock behind a whole branch of the talent tree.
Anoint in Blood & Backstabber lock behind 1 stat node, 4 “effect” nodes, and grenade type.
The Emperor’s Bullet & Dance of Death lock behind 5 “effect” nodes and aura type.
You will struggle to find a person who wants to get Beacon of Purity and is glad that they have to get The Emperor’s Bullet in order to get there. For a talent that needs a setup it gives such a weak bonus with such a short duration which makes it possibly the worst talent zealot has. Meanwhile Benediction has +5% movement speed there which is pretty much always useful and almost always does something for you.
Don’t get me wrong - maybe you can find uses for those talents, but they should not be mandatory if you want to go for specific grenade/aura.
What I would suggest is - give them some sort of alternative and/or move them to the sides of talent tree (similarly to staff related talents on psyker).