[neverminder]

Modafinil is not a long term solution. Sleep deficit that you would build up would have to be "paid back", or it would become detrimental to your health.

By the way, those few people who need less sleep most likely have certain genetic advantage that the rest of us don't: https://www.scientificamerican.com/article/genetic-mutation-...

[rubber_duck]

I'm​ not sure it's a 1:1 relation, eg. say you cut 12 hours of sleep during the week but sleep extra 6 hours on the weekend​ or something along those lines - cycling on-and-off according to your schedule.

As I've said I haven't tried it yet will do some research before I do, right now I'm trying out other stuff and it wouldn't be wise to mix so many unknowns.