Diabolos was everything I wanted but..

[Madoka]

Even if they won't add some of these summons as egis, the least they could do was add an ability to summoner that lets you summon them for one big attack. I'm sure they could come up with some random thing to make it fit into the lore.

Actually the Lore entirely shits on the idea of a summoner summoning a primal directly, or any hostile monster that can temper.