Who to Upgrade First in Horde

Resources are spread across too many units and the run cannot reach high waves.

Guide steps

1. Build around only 6–7 core units instead of leveling everyone evenly.

2. At T2, get frontline units to level 3 before key healer and Cheerling upgrades.

3. With T3 damage or teamwide support, push one level 7 unit early to snowball.