[Suicide Junkie]

Unfortunately, your planets would still have to worry about phased weapons & null-space.

As an alternative, try increasing the hitpoints of raw population by 50x.
Add a platform mount to increase their hitpoints by 50x as well.

Then, increase the damage from planetary weapons (or shrink them, allowing more on a ship)
Remember that SE4 will get an RCE if the damage (after adding mounts) exceeds 64K!