This.

It'd keep the damage buff. Just trying to fix how the rest of it is pretty unreliable.

Sorry, I just got tired of this thread but still disagreed and probably did not phrase that in the most diplomatic way.

Anyways, you don't have to battle me here anymore.

I like this because it wouldn't depend on culture centers being present at the target planet for it to be effective.  I see culture centers as being a counter to the deliverance engine, not a liability.

Quote Sins Wiki:

Designed in the shape of a massive, floating eye, theDeliverance Engine's piercing gaze is to be feared by its enemies, and championed by its allies. The Deliverance Signal it projects can strike anywhere, often without warning, but its effects are anything BUT subtle. Upon impacting a planet, the Unity's power is spread to the populace, causing its citizens to overthrow the current government. Any friendly ships in orbit also have their resolve strengthened even further, causing them to deal more damage than previously possible.

With research, the Advent can station a pair of Deliverance Engines at any planet of their choosing - asteroids, however, can only have one at a time. A single deliverance signal will cause a -3 culture rate for the planet until the planet revolts or your culture is pushed away, two blasts will cause a rate of -7 but that is the maximum possible loss, so if you have more than two it is best to spread them out more unless there is no nearby planet with a population.

Tactics

Since the Deliverance can target your planets as well as those of your enemies, it makes for a great "panic-button" superweapon in the event your ships need an extra kick to their firepower. Additionally, the fact that the Advent's culture spreads at an incredible rate makes ensuring planets don't slip from your grasp a much easier task. To top it all off, researching Eyes of the Converted makes it perfect for spying, as it allows you to see any planets within your culture's influence.

If you decide to set up a massive "Deliverance System," set them all to a hotkey you don't use often (say 9 or 0). When the time comes (that is, when all Engines are ready to fire), try focusing fire on a single target (for the best results, use Tab and "Q," its "fire" hotkey). Unlike the Kostura or Novalith Cannons, you don't need to target multiple planets individually for its effects to be felt (not to say it doesn't help). Your opponents will VERY quickly find their culture being lost at a rapid rate, and one by one, their planets will fall.

Proposal: 1 shot only with a -7 culture rate effect. 

However as it stands the engine does support advent fleets.. we will likely never see it change from the -3

edit: just another hidden gem in the egine's  weakness

edit: unbelievable ah? even the engine has a synergy with allies and advent ships. 

Bare in mind when conquering planets on the front-line you should have a starbase with all culture modules researched for an extra kick-that is the other synergy.