With Summoner I would

-Prefer they keep the Egi, however bind it to the Summoner as an animation rather than a pet.
-Be inclusive of all 6 Elements. Possibly using combinations like Mudra to channel different Egi like Bismarck or Sophia.
-Use the elements to form a cohesive rotation.
-Repurpose Physick ffs.
-Add Odin and Alexander as Demi-summons.
-An Avatar state that allows you to become a version of a primal, similar to this new Repear fusion.