I think a decent rework would be to chnage the Egi system into Demi-(insert respective pets here) and have the pets work as they are for ARC and SCH. for starters have a Demi-Garuda, Demi-Titan and Demi-Ifrit, but I'm not certain how they work differently from the Egis (and more specifically if they need a Trance to work, cause if so it might complicate the leveling experience)
I would also try to chnage the DOTs to be more flavorful and keep the poison theme on SCH. For example have Bio be Ramuh-themed, Miasma be Shiva (or Garuda)-themed and have another for Leviathan.
From there we can make retrofit the egi glamour into fitting the Demi summons with new carbuncle forms for Bahamut and Phoenix (Moonstone and Sunstone) as well as new colors for the existing carbuncles (Amethyst, Sapphire and Aquamarine). Other forms would be the Eden versions of the 2.X primals.
Lastly would be a Trance for Shiva is she doesn't go into the demi glamour system, as there would be personal reasons why the WoL would invoke the Lady of Frost much like there would be one for Phoenix.
