I get the feeling most solo runs involve reloading a save 5 times until you get lucky 😅

I get charmed usually once in three turns, sometimes 2. So Invisibility potion (+ double attack starting level 5) + haste + helm = profit?

Can't charm what you can't see, right? If you can kill roughly one harpy/turn, that's 4-5 potions? One method to stealth kill...