I full-starred Kingdom Rush Frontiers' main campaign + Heroic and Iron stages with only mage towers! I used Captain Blackthorne for every level, too (i.e. no OP heroes). This challenge was probably harder than Veteran difficulty--and lots of fun! Now onto ...
Kingdom Rush Frontiers - Original Soundtrack | HyperDuck SoundWorks
Kingdom Rush Frontiers - All Achievements Guide
Darn Bloodshells :/ : r/kingdomrush
Kingdom Rush: Rising Tides Update Now Available | The iPhone FAQ