Changing things a bit......
My son wants to run a level 20 3.5 adventure. He made the mistake of saying I could build what I wanted so long as it fit within his homebrew. His game world, Elves are psionic Spelljammers and Giants were the creators of everything- including Dragons.
I made my character- Android psion shaper specialist.
My son told me what his Big Bad was- Colossal Red Dragon with a Titan riding it. He was heart broken when I showed him about four ways I do an instant kill in one action of the dragon. DC 30+ saves or be destroyed or the powers of some of my Astral Constructs would do it in one round.
Psionics at Epic level are scary.