Is Wail of the Sacrificed overpowered?
My understanding of the Advent Rebel ability, Wail of the Sacrificed, is that it does 20 damage for every point of population to all adjacent gravity wells. So, if a planet with a population of 180 is sacrificed (like an ice) it would do 3600 points of damage to all ships and structures in adjacent wells. That's worse than a missile barrage that affects the entire gravity well.
Is this ability overpowered? Should researching it be a Level 8 ability and should there perhaps be a monetary/resource cost to using it as it stands now?