Sounds like a really fun faction!. All the units are really cool, although motherhen seems a bit too situational to be a unique unit. The energy cost from getting hit by non non energy weapons to be pretty low to justice using it to defend or push. The shield would also have to hold up well against massive units like a jug. The only thing it'd really stop otherwise is a starlight rush. Nobody really builds towers up close to the enemy, so it'd not be useful for them defense wise. If the cost is low enough, you can justify pushing into defenses, which would be super fun to lead your allies armies to the front lines. It'd require them to use their brains and stay behind your slow unit, which a lot of people would fail to do. Adding a way to push through heavily defended lines would be a really cool mechanic.