Quote Originally Posted by Bishop81 View Post
...
  1. Clone the 2 existing Carbuncle summoning spells, increase the potency on the Carbuncles they summon.
  2. Redirect Summon I and Summon II for SMN to point to those spells.
  3. Create Summon IV and Summon V, and point those to the spells that summon Titan-Egi and Garuda-Egi.

Done.

All the above are trivial to implement.

I have no idea where you get the idea that we need config windows ...
please look forward to 3.0 egis with Summon1378493493 as a spell name.