Calliope’s late-game upgrades are energy-hungry. Build 20–30% more power plants than you think you need. A shut-down Calliope during a wave is a game-ender.
To maximize Calliope, you need to invest her skill points into the right stats. Based on player consensus r/TheyAreBillions , the focus should be on . Priority Stats: they are billions calliope build better
The infected will funnel through the gap, clumping up perfectly for the Banshee’s AoE attack. Because the Banshee has range, it can hit the clump before they breach the wall. Calliope’s late-game upgrades are energy-hungry
Ultimately, the choice between Calliope and Caelus comes down to playstyle. Caelus is a classic "tank," capable of absorbing hits and dealing massive area damage, making him a rock in a defensive line. Calliope is a "skirmisher," perfect for players who prefer aggressive scouting, quick movement, and precise threat management. To maximize Calliope, you need to invest her