First, I’d say with the cores you chose, you’re sabotaging yourself if you’re truly aiming for a ultimate sex custom.
You have Diamond, Divine Diamond, SM, SSX, PN or RotNW, or any constellation of these.
There’s also NRE and NDE.
I’d probably choose DivD, SSX, PN and NRE
And what are your goals and where are you starting from?
Are you in a relationship or single?
Are you looking for hookups and fwb or for something serious (what would be the base for ultimate sex imho)?
Do carry around wounds and trauma concerning sexuality?
Some borrowings from my Lost in the Dance custom
Equilibrium
Flexibility, balance and agility are important.
Master’s Coordination
Cordination is extremely important for complex figures and moves.
Inexhaustible
Joie de Vivre
The basic module for enjoyment
Synergy: Semper Praesens
Forget everything else. Just stay full in the moment, in your body. No regrets, no worries, just enjoy the bliss of the present.
Formless Clarity
Clear your thougths in the now. Let the body move on its own.
The Wonder
Endless curiosity and fascination
Khronos Key
Stretch the time, the bliss to dive in even more
Earthshaker: Sexuality
The air of sexuality. To bring this feeling to the next level.
Aura of Craving
For the ultimate hunger in her eyes
Synergy: Beyond Connection
To build this deep connection that keeps you going for hours non stop.
Devine Self Image
Could be unnecessary with Semper Praesens and Formless Clarity
And perhaps
SYNERGY: Chosen of Venus