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In this challenge, the enemies build nothing special other than the spawned hero blob. Players won't have much trouble holding the ground thanks to the well-placed tech defenses. Suffice to say, stopping the waves of heroes is synonym to beating the challenge itself.
Units or buildings with excellent anti-infantry capability will play a key role here. Considering the immense anti-unit and siege firepower the heroes possess, it is advised to employ aerial anti-infantry units, so that only Norio, Libra and Uragan can attack them.
The Cyborg Commando's 2500 health and high damage is not to be taken lightly. Either concentrate firepower and destroy it quickly (including one-shot it with Chitzkoi), or focus on eliminating other heroes and deal with him last. Don't forget to deploy stealth detection and give Malver a warm welcome.
Without doubt, Allied Rocketeers and 
Pacific Front commando Norio make short work of enemy hero units. While the Epsilon Invaders, especially when coupled with the Irkalla, are capable of taking care of the heroes too, they are less cost-effective but more error-tolerant. As always, the Foehn Buzzard remains a prudent choice.
Not a familiar face in other challenges, 
Latin Confederation's Vulture chopper boasts unmatched air-to-hero firepower (barring Heroes and Epic units of course). Though it demands a higher technology level, the players should still be able to build at least ten of them before the first wave, which is quite sufficient.
The 
Chinese Gyrocopter is ill-advised for this challenge due to its terrible accuracy against a single target.
