AI and planet destroyers?

[Q]

Thank you Rollo for your answer.
You seem to have the same idea as I, because I created the new vehicle type "deathstar" which is a slow but huge ship of 5000kT, that I want the AI to use as planet destroyer. Of course the idea is the one of Star Wars and I would only special AI empires make use this ship.
It's main weapon is the tectonic bomb for the destruction of the planet but a lot of PDC, shields and armor and some ordinary weapon for defense should make it a quite powerful threat.