I've only seen joy one time in the four or five weeks I've been playing again. I'm not sure why you would test using joy. The best comparison is in speed runs because the player is trying to get the most out of their build. I took a look at some of the video of failed attempts. The best devastator time (from when they appear to when the dragon drops) is 1:06 without joy. Take a look at your sorcs videos and if there's one that even comes close to that I'd be very surprised. I'll put the video aside in case you're interested.