Originally Posted by Darth_Xavior
hey but im talking about a strong empire led by a sith king from Koraban.
The Sith don't have a king. They may have when they were simply scattered tribes on Ziost and Korriban, but for many thousands of years their highest position has been that of Dark Lord of the Sith. Sith who have conquered worlds have called themselves King (such as Freedon Nadd when he ruled Onderon, but there is no 'King of the Sith'.
And as for Korriban being used a throne-world, it hasn't been used as such since the New Sith Wars, but it had always been occupied and abandoned by whatever Sith had ruled at the time. Look at it during the times of Revan:
Under Revan's Sith Empire, it was a strong base, the site of colonies, and the Sith Academy. But a mere five years later, the entire planet was in ruins, the Valley of the Dark Lords all but forgotten, the Academy abandoned, as was the planet.
Each new generation of Sith 'remembers' Korriban, using it for a time, until they can use a better base. And frankly, the galaxy at large isn't even aware of the planet's existence. The center of Galactic politics and government has been Coruscant for as long as the Republic has existed (nearly 25,000 years). Any would-be Emperor would be foolish not to choose Coruscant as a capital - it is the location of far too much to be ignored.