I'm a fan of this approach + limiting it to tier 3 as others have suggested. I mean, I think all call-ins should be tied to buildings, or at least all tanks, but yeah. Oh please. You weren't watching momo's stream the other day. (He won, btw.)
Literal nobody* used it, then relic changed aura to be a radius instead of depending on map zones, nothing else.
Since release, which is 2 years aura wasn't op.
So hard:
Victory needs no explanation, defeat allows none.