What role for Titans
The Titans need to instill fear. So far, the Titans have two opposite roles.
Ankilon - super strong defender.
Ragnarov - super Destroyer.
The rest of the Titans should have a role. Fearsome. And different from the above TEC:
Coronata - conqueror. He who subdues planets. This can really inspire fear. I hope to "Orbital Structures" is also able to subdue.
Vorastra - a mobile base. So horrific that can replenish their troops.
Eradica and Kultorask role - still not clear.
Eradica - gluttonous (someone who can quickly improve their condition by absorbing other)? It must be the highest limit of HP. Or it could absorb the supply of antimatter and shields as well. To compensate for the high regeneration Ankilon (which is quite hardy and without absorption of other forces). But it must also be something terrifying. For example, it can be Huge aircraft carrier.
Kultorask - "contains the refugees of the Vasari" ...