http://www.appbank.net/2014/04/23/iphone-application/799824.php check out starting at around the 7:00 mark. Shining ray has a cool down of about 1 second in the video. As of right now, the skill has an in game cool down of 20s, and I expect that even with cool down branch, it'd probably go down to only 16. I don't know as I went with power up branch too. also I think shining ray is not a transferrable skill when class is mastered. This is just a hunch based on the findings in the rogue forum.