So the way the player unlocks this achievement is by not building any ranged ants. Simple! Or if that would be impossible, just severly limit the amount of ranged ants the player has.
1. Wood ant melee deals weaker damage than worker, making them useless agaisnt hermit crabs healing. Their high health means nothing to area attacks and stun from tiger beetles.
2. The combination of wood ants and black ants cannot be stalled.
3. I suggest changing it to either: "Using no melee" or "Using no worker".