Chrono mod for rouges

Hi! I was playing with my rouge yesterday and I came up with this idea: I was wondering if you guys could make a mod for rouge players. It's very simple, it's just a 5/5.5 seconds countdown that appears at the moment you press your special ability button so you can know how much time you'll still be invisible while attacking a cube god, skull shrine... Just a timing tool. You could also add an alarm which sounded when there was only 1 sec remaining or something like that. Thanks for all the job you do in the forum!