[PvK]

I think you could use a tech area that gives you the "geometrically transcendental" mount, which divides all component sizes by a number (larger as the tech advances).

A time ship would also have good cloaking levels and good temporal scanning levels. You'd need good temporal scanners to detect them. The Time Lords are psychic as well as time-sensitive, and you seem to need both to be able to pilot a time ship.

Thing is, the Time Lords don't want to rule the galaxy. I suppose though that you could make a scenario where everyone else is an unenlightened powermonger type trying to conquer them. I don't know that SE4 is particularly well equipped to handle it, though. Brute force can't really work - there always has to be some sort of gimmick or ruse to enable force to be used.

PvK