User blog comment:DYBAD/Character Sheet/@comment-25417020-20141105202030/@comment-4867780-20141107145125

Soldiers only exist in limited numbers, but have access to a huge amount of resources via conversion, that can be used to fuel their upgrades or create new ones.

Soldiers would also be upgraded with optimal anti-aftershock weapons via analysis of empirical data collected during the battle, allowing to neutralize such defenses.

And considering the EAP allows them to feed on Aftershock troops, they wouldn't stay immortal for long (only entities that always existed can be considered as amortal).

If worst comes to worst, then it will be time to brings out the Vortex Bombs and some some tide-turning massive damage, before converting it into even more Soldiers.