I want summoner to "equip" summons. It shares the idea with Dreadwyrm Trance where the power of Bahamut is invoked, rather than brought in as a separate power. Something like if you summon Ifrit, he isn't out there attacking on his own, but your Ruin spell is transformed into some sort of ranged fire slash or other effect that Ifrit contributes to. Outburst would change similarly. The visuals of these skills would be the main appeal, but would also be varied and balanced across summons. "Summon Demi-Bahamut" could be eliminated, and Dreadwyrm Trance would serve to summon Demi Bahamut in a similar effect, and Ruin would then become "Wyrmwave". The build up to use Demi Bahamut could still be the same or similar.