Need help building a super powered empress for a gestalt game

[Nosta]

Hello and good day.
I am here to seek build ideas for a Npc

She is a god "like" empress that stopped aging when she was still young
I am having trouble picking her classes. she needs to rule with an iron fist

her army most powerful general is an old Monk/wizard level 18

her actual age is about 10,000 years old but she looks really young

I want a combo that would make it so she can stop a fight by just walking in a room by her mere presence

I am also thinking of giving her maybe a little divine rank but i'm not sure

she'll be level 20 and half access to any item in game including some very rare artifacts and relics will reside in her treasury.

she is to be a villain from the point of view of the rebels in my game.

she needs to be able to sit on her enormous throne and be able to completely own her enemies if an an attacker were to make it in to the her throne room

so i'll just sum it up I need a very op gestalt combo befitting a never aging empress Npc

[gawwy]

First step does she have to be living?

there are some good combos involving evolved undead and Tomb Warden.

also do you want touch ac and saves to be stupid high or would you rather use immunities and contigencies?

do you want her to use hp damage, ability damage or save or dies?

Also what house rules do you have?
Do favored souls cast entirely off of cha or are they wis cha based?

[Nosta]

First step does she have to be living?

there are some good combos involving evolved undead and Tomb Warden.

also do you want touch ac and saves to be stupid high or would you rather use immunities and contigencies?

do you want her to use hp damage, ability damage or save or dies?

Also what house rules do you have?
Do favored souls cast entirely off of cha or are they wis cha based?

Huh? I guess she could be undead
immunities and contigencies?
I like her to use save or dies
and I house rule wis cha based for favored souls

[Ravens_cry]

Maybe Bard on one side? I see an Empress being very charismatic and inspiring, exhorting your people/party with speeches like (https://en.wikipedia.org/wiki/Speech_to_the_Troops_at_Tilbury) "I know I have the body of a weak, feeble woman; but I have the heart and stomach of an emperor, and of a empire of the Empire too!"

[gawwy]

Necropolitan human (maybe add magic blooded and spellwarped in there)

Evolved undead 17/Tomb Warden 3
Dread Necromancer 1/Rainbow Servant 10/Mindbender1/Mage of the Arcane Order 7/Sand Shaper 1

of course assuming rainbow servant is 10/10 casting for your game

All PHB sorcerer/wizard spells, plus all cleric spells, with some bonus ones thrown in from the sand shaper and dread necromancer lists.

Cha for bonus spells and Saves as well as cha to hit ac and saves 10 minutes a day

cha = 18(base)+5(levels)+5(tome)+34(evolved undead)+3(age) for 65 cha (+27 mod)

pretty sure you could drop the MotAO for incantrix and take a level of marshal to get cha to int and persist anything if you didn't mind getting smart about using cleric spells.

Also at this point i should ask. is she evil or good or super good?