[Jmenschenfresser]

automannj,
all of that can be done...except the Last two. What hinders creating effective palaces are any empire effcting abilities.

There are two ways to go. The Proportions way, where in making it a long arduous process to build alternative centers of everything, you make the homeworld indispensible. So then if the palace has abilities which significantly hurt the homeworld, you accomplished your goal. To me that is the more realistic way to go.

Or try to make the palace itself important. This is nearly impossible given the present abilities available.