Ok I must be really blind… From episode 11 patch notes:
- Skills that are cast using targeting circles will support auto-targeting, which can be turned on in the options menu.
- Turning on Auto Skill Targeting will automatically place the targeting circle over the enemy you are currently locked on to.
There’s no such option in the option menu. And the option is clearly not on by default, since it’s still the same crappy system that makes you waste all your skills on your head instead of targeting the area you click with your mouse…