Regarding the Titan-Egi situation, honestly I feel like we should just take it down to a single target pet and an AoE pet. What could happen with Titan would be similar to the Selene/Eos scenario where Titan functions the same as Ifrit.

This could also be done with the missing Egis getting added in a future patch (hopefully) where Ifrit-Egi, Titan-Egi, and Leviathan-Egi are the single-target pets while Garuda-Egi, Ramuh-Egi, and Shiva-Egi are AoE pets.