[renowner]

Another reason to use the mobile platform thing engineers get would be pretty cool, but i'm not sure I really like most of what the boosts would be.
I'd much rather the rail gun be changed to not have its invocations broken by damage, but broken by water or lightning damage. That seems like a good flavorful idea.
And the mobile platform only being used for rail gun which already has really high range is just generally not worth it in my experience.