The Complete Miner's Guide by Halada54
Assuming you have Capital Industrial Ships IV, you'll need 750 units of Heavy Water (currently priced at around 20 ISK/unit) per activation. The Industrial core activation lasts 300 seconds, so every cycle costs 15,000.00 ISK per activation. In one Industrial Core activation, you have just about enough time to run 6 compression jobs if you're efficient. Each compression job will cost you around 2,500.00 ISK. Not too shabby, huh?
It will cost you approximately 180,000.00 ISK per hour to keep the Rorqual sieged (preferably safe at a POS) with Capital Industrial IV, which is not a lot, especially If you're running a mining op with multiple miners.
Foreman link bonus
Along the compression lines, the Rorqual also boosts the effectiveness of the Mining Foreman links, which are the Laser Optimization and Ice Harvesting links if you had already forgotten.
Without the Rorqual, we had determined the link's effectiveness was of 22.5% with maxed skills, which translated in a 29% direct yield bonus. With Capital Industrial IV:
2% * 5 * 1.5 * 1.5 * 1.2 = 27%. This translates into 1/(1-0.27) = 1.3698 , so approximately
Worded differently, the Rorqual boosts the fleet some more by 8% compared to a carrier or a command ship. However, we can all agree that this 8% increase when using the Rorqual is an extra special feature on top of the main program, which is compressing.