As I like to play very large maps against my friends and the hard AI I have been really noticing the very poor power of the Advent 'superweapon' when compared to the other races. As a quick review of the effects of the superweapons:
TEC: Novalith Cannon
Primary Effect: 3500 planet damage
Secondary Effect: Cannot re-colonize
Tetrary Effect: Population cap reduced for a long period of time
Vasari: Kastura Cannon
Primary Effect: Disable orbital structures for 3 minutes
Secondary Effect: Disable ships for 15 seconds
Tetrary Effect: The planet acts as if there is a phase gate at the location for a short time
Advent: Deliverance Engine
Primary Effect: Powerful culture spread from the planet causing a loss of about 20% allegiance
Secondary Effect: Shield mitigation increased due to to required culture research
Tetrary Effect: None
As you can see, the TEC get to hide within their defenses while destroying the universe (I like the alerts you get when they use their weapon, btw ) and the Vasari can make a deadly deep strike into your territory while your buildings are frozen. The Advent can merely have a little better defense for an attack and, perhaps, take out a planet in many hits if there are no enemy culture centers. What I would like to suggest is a set of possible tetrary effects that could be applied at the planet. In order from the most to least powerful are:
1. Ship Domination - Some random frigates and cruisers at the target planet are converted to be loyal to the Advent. No more than can be received through a level 1 Vasari Dark Armada though for balance sake.
2. Culture Domination - Enemy culture broadcast centers are corrupted to spreading the Advents beliefs and change ownership. This should be limited to 1 or 2 at the location per shot and would make the allegiance loss more than temporary.
3. Culture Destruction - Enemy culture broadcast centers are destroyed slowing the recovery from the Advent culture. Again it should be limited to 1 or 2 at the location per shot and would make the allegieance loss have a larger impact.
4. Culture Addition - A Temple of Communion is built at the planet to spread your word (using the planet owners resources, if available ).
To be honest I would like it to do a mix of the top 3 depending on what is at the planet and a random roll of the dice (ie 1 brodcast center converted, 1 destroyed, but only 1 scout converted).
Compared to the game ending power of the other two superweapons I think any one of these effects would only bring the Advent cannon closer to the power of the other two and would in no way surpass them.
Thanks for reading