Or Command and Conquer Generals, where you snipe a USA dozer with jarmen kell and then get air cover for your suicide bombers. : p I love that game ...
But correct me if I'm wrong: there is no tech to build a TEC starbase, just a tech to get the constructor. The build starbase ability has no tech prereqs, therefore dominating a TEC constructor would allow you to build a TEC starbase. It wouldn't allow you to get a factory in it (because that's a TEC tech you dont have access to) but you WOULD have a bottom-of-the-barrel TEC base.
Vasari migrators need a tech to build a starbase ergo it wouldn't work with them.
Has anyone tried this? Vindicate me here people ...