my answer would be a generic "git gud" because Maybe you haven't got the trick.
Buy Endurance pills, Ejaculate alot in yo robo girl, 0 cum = buy SimpillX to refill.
SimpillX = Your HP Potion that gives you half of your health.
Endurance = Your MAX HP.
this is effectively leveling, reliable, and easy, this will bring you richest in no time, just keep in mind that Endurance can kill you if you take too much(you can avoid death by a certain glitch) and SimpillX drains your energy, just sleep and it will be fixed
Oh and a tip im not sure of, i think that manually fucking gives more views which leads to more subs, tho your hands needs to be faster than Automatic fast fucking.