"Laser Drills are not only useful for digging, but for interrogation of foreign secret agents"
At least 10 M comrades per second is recommended for the high unlock requirement. A discount of 10 B will probably be necessary to buy them pre-automation at Rank 107, due to the insane Ozone Collectors cost. Thankfully, the production cost is roughly the same difficulty as Bombers and Sky Farms, allowing billions to be bought with 8M bonus and 16k power if you can unlock them and afford the generator cost. Despite this, this generator has yet to have a mission in the billions, even Rank 130 only requires 176 M laser drills. This makes the ore industry very easy in the 110s and 120s, even the hardest ore mission of 2.8 FFFF ore is barely harder than 105's 12 AAAA ore thanks to laser drills.