I can add some info for all uneducated lads complaining in the last 30 or more pages:
- whattomine blake2s estimates are for solo mining. So your expectations are wrong from the start...
Hopefully that is obvious, but most people zero out the equipment part of the equation anyway because.
For dual mining you need to - at a minimum - at least adjust the power spent, also.
For my example I assumed zero costs except for 10% more power because the equipment costs basically nothing more than single mining and my wattage goes from 83-85 to around 92-94. Certainly far from perfect, but better than not adjusting.