They Are Billions , is a high-speed, rapid-fire agent whose primary advantage in tactical missions is her ability to kite enemies. Because she is naturally fragile compared to Caelus, a "new" or optimized build focuses on maximizing her offensive lethality to eliminate threats like Harpies before they can close the gap. Calliope Optimized Build Order
For every 50 infected killed by her sonic weapon, your colonists gain a "Morale Boost" (hidden stat) increasing wood production by 10%. To maximize this, you need more colonists, not richer ones. they are billions calliope build new