It would be interesting to replace "Ruin" with Egi Assault, design SMN around the idea of swapping out pets to build up Trance rather than using Aetherflow.

Maybe do something where each pet applies a Debuff that increases the potency of the following pet, when the timer on X Debuff wears off a Y Debuff is placed on the target allowing you to apply another debuff to empower the next pets actions.

Flowing something like Ifrit>Garuda>Titan>Ifrit and rotating through them til you build the ability to use trance, then with the combination of Trance/Egi Aether you can summon Bahamut/Phoenix.