What's a good iOS game for engaging tower defense strategy with base building elements?

Age of Origins:Tower Defense provides a comprehensive tower defense experience where you not only strategically place towers to defend against waves of enemies, but also manage and develop your base. You'll need to gather resources like food and oil to sustain your troops and operations. The game features a variety of towers with unique abilities, allowing for diverse defensive strategies. Forming alliances with other players is also a key aspect, enabling you to coordinate attacks and defenses. The combination of tower defense, base building, and alliance warfare creates a deep and engaging gameplay loop that keeps players invested. If you enjoy strategy games with multiple layers of complexity, Age of Origins:Tower Defense is definitely worth checking out.