yup not ingame at the moment but at max taunt lvl I noticed that the red X dissapears before you are in the correct range. It is espacialy difficult when taunting those verry agro Goo infected mobs because getting to close and you get all of them on you so trying to taunt them from as far as you can you can't watch at the icon, you need to watch at range instead and that's less accurate.
---