The description is a little vague on the vengeance generators. It suggests that ships that die near the planet charge up the generator, then it spawns dark spire ships in response. How does this ultimately work though?
Does near include neighboring planets?
Is it one ship per ship that dies delayed by time?
Is it an accumulated total which builds over time?
Does it lose energy when it spawns ships?
Once it spawns ships, will it ever stop spawning ships?
Right now we have 2 vengeance generators behind our first main choke point (there is a second there to fall back to that surrounds the generator) There are about 7 worlds directly adjacent to the generators, as well as about 4-5 more between the two choke points.
We destroyed the command stations in those worlds with the vengeance generators, and then let the ships chase us out of there to kill them elsewhere, one generator in the process produced about a dozen ships. Once out of there, we killed all the enemy ships and then went back for the guard posts.
We waited till there were no ships left between the two choke points, and then claimed all the worlds back there. Nothing had spawned in that time so we thought it pretty safe. Soon after one of the two generators spawned 3 ships, and has regularly spawned 1-2 ships every 5 minutes after. We don't fight them there (no defenses at all) and wait till they are away from the generator before killing them. However they've kept coming.
Should we just suck it up and accept that there will be a few ships preventing us from holding that one world, or will it eventually stop?
Edit: Search finally worked and I found the answers to all my questions and more. Just for posterity I'm putting them here so other people new to them can see them.
1. Vengeance generators get build points as ships die on their planet. Not neighboring planets.
2. Vengeance generators are linked in a fashion. When one gets enough build points for a wave, it spawns ships, and all other spawn a smaller wave of ships.
3. If no ships die at any of them, they stop getting build points altogether, and are inactive.
4. To make a Vengeance generator totally safe to colonize, you have to control all of them, and make sure no ship ever dies there.
Our situation turns out that there are 4 generators, only 2 we control. One is right next to the Dyson Sphere and also has a Super Terminal there, so the game is inviting us to have !!FUN!! We freed the Dyson, so it's repaying us by generating vengeance. Thanks bros.