Hrm...lessee...
Umbrite is 300 tomes, so with 2000 headstart, you'd have have 6 Umbrite right away. You need 80 without bonus procs, so make that 76 for easier calculation - 6 of which you already have. Let's say you can run Aetherochemical in 20 minutes for 150 tomes. So every 40 minutes, you'd get 1 Umbrite. Makes a workload of 2800 minutes or 46,7 hours. If you assume more realistic 25 minutes, that's 3500 minutes or 58 hours. Roughly every 3 days, the roulette bonus of 60s would shave 40-50 minutes off that. So in 10 days, you'd look at 3350-3300 minutes workload. Let's make it 55 hours. So 5,5 hours of Aetherochemical research facility a day. More if you go for less efficient options.
