I completed the first experiment on impossible using only workers and no minor improvements.

[ahyesants]

Took me a good amount of attempts. Here's the screenshot of the winning run. I used RG and fierce mother for the queen. To let my royal guards kill more enemies until my army respawned. Which worked perfectly. Thanks to multiple community members for the tips. More nest workers was essential.

 

[ahyesants]

The thing that worked best for me (and ultimately, allowed me to do this) was putting the marker with 37 ants on the black ant spawner. The second marker has 2 groups of 15 ants for the whole challenge until the last sustained flow part. By then I put one of the groups in the nest. Once all my ants on the black ant spawner died I kept everything inside and just waited.

 

[carp worker]

а солдатів чому не зробив?
тоді мабуть королівскя гвардія не дуже потрібна

 

[ahyesants]

а солдатів чому не зробив?
тоді мабуть королівскя гвардія не дуже потрібна

The challenge I had to do as one of the requirements for the junior ICS role (which I still haven't completed all requirements) was completing this challenge using only workers on impossible. I decided the challenge and the founder of the ICS agreed that I could do this.

 

[ahyesants]

It was fun trying different strategies, although I did lose some motivation towards the end. But I was able to do it. I could have done it earlier if I didn't put that chamber so far from the queen though.

 

[carp worker]

вибач, а що за ICS
перший раз про таке чую.

 

[ahyesants]

вибач, а що за ICS
перший раз про таке чую.

It's a group of people that do the hardest challenges in the game.