Before she went to sleep, Nico set the production settings for the warehouse that she had requisitioned to replace the Drone Bombers as they were destroyed and have them patrol the area around camp.
They had all been taken down during the last assault, and she couldn't have them fly much higher without risking an attack from the ships above them.
For such crude weapons, the missiles that the Myceloids used to attack the bombers were surprisingly accurate, and the damage was enough that very few of them survived to limp back to base after being hit.
They had done their job well, though, and the gaps in the attack waves were enough to give the other flanks an occasional breather, while the Mecha had enough area attack ability that their portion of the line had managed to clear large portions of the wave multiple times that attack.