The description for the Open Sesame achievement says: Dispel 50 wards. When I bring up the Dispel Ward menu I have the option to either 'Dispel' it or 'Auto-Attempt' it. If I auto-attempt and it works does that count toward the Open Sesame achievement?
Yes, they do. At about 1:30 in the video, you'll notice one of the tips is actually to use Auto-Attempt to make things go quicker.