Demi-Summoner Idea

[Jandor]

Unless it's meant to imply that our mastery over the Dreadwyrm Trance, where we infuse ourselves with Bahamuts aether, is bolstering our aetheric reserves to allow for such massive increases in power of our summons (Thus, we should be able to go back to Mor Dhona and summon Ramuh-Egi and tame him)

I can't really remember, it's been a while. I was basically under the impression that all the Bahamut related stuff is using external sources of aether, specifically aether that Bahamut left a mark on, which in Eorzea at least is pretty much all of it to some degree or another.

I got the impression that because egi are manifested primarily from our internal aether stores they essentially cap out based on your reserves. We get three because we're the WoL, other people might cap out at two, or even one.

The egi aether cap feels more like more 'excuse lore' than anything else though, it barely makes any sense, you only ever summon one at a time anyway.
How does having the option of one, two, three, etc in reserve make any difference? Are the currently unsummoned ones always draining our aether to a small degree? Titan-egi just forever sat in our soul like a big orange aether capping dead weight?