I am playing a 3rd-level wizard, and I have to say sleep seems really overpowered as a spell. On numerous occasions now, a combination of sleep followed by the rest of the party slitting throats has seen us clear enemies really quickly.
I even used it on a charging bugbear getting him to pass out just before he reached me, we then managed to take him down to just 4 health in the next round of combat before he woke up. And a wolf who was clamped onto the leg of a PC.
Our GM does have creatures wake up as they take the wounds, but 9 times out of 10 they are already dead, given that they can’t defend themselves from the stabbing. Are we doing something wrong here with this spell? Having spoken to other wizard players, they have told me they find it a pretty useless spell.