Aethergems aren't just for engines.
I'd like to point to this line in the Aethergem design:
The charge capacity of the Aethergems is the least important aspect. If we must sacrifice a component of Magegems to ensure proper expense, then we can sacrifice the charge capacity for the charge rate and expense.
The thing is about Aethergems, is that I'm envisioning them as an end-all to magical storage. So we can just put an Aethergem in a design and call it a day. Understand it's not meant as a long-term battery. Of course not.
It's meant as more of a...
capacitor. So we can put a single AA Aethergem inside a AS-R1 and have it be able to power a shot between self-charging instead of requiring both an AA Aethergem and an AA Magegem, taking up twice the space and ever so slightly increasing expense/complexity.
So we can have power armor fit with Aethergems and not be forced to take clunky measures, lining it with Magegems when we could have just kept this current design of Aethergem and use a single A/AA Aethergem inside the power armor.
So we can have artillery pieces each with a single AA Aethergem allowing it to fire by itself without requiring us to invest more into also putting in Magegems. So we can put Aethergems in artillery and magitech in the Aethergem design, because it'd be harder to do if we had to do both Aethergems and Magegems.
C'moon, RAM. Of course the priority of Aethergems is power generation. It's not a stretch to even say they can hold power. They're an upgrade of Magegems, after all. They're what happens if you take a Magegem and add self-charging capabilities to it. I included this for a reason.
Vote for Aethergems, RAM.
C'mooon.