Countdown macro help.

[Rongway]

Use

/cd 15

This is the built in countdown timer.

Its one failing is that it can't be used once someone has aggroed the mob. This is not a problem most of the time, though there are a few fights where it could be helpful to have a custom countdown macro (e.g., Chadarnook (Sigmascape v2.0) becomes targetable 17s after someone crosses the center of the room, but if you miss your chance to /cd 18 as someone starts running up, you can't use the built in countdown anymore). However this sort of thing is rare, and you'll be fine with a /cd 15 most of the time.

Just know that you should start at 15. Starting at 11~14 will skip the 10s warning, and all they'll get is the warning that a timer started, and then a 5-4-3-2-1.