Macro Script Help.. please

[GOSYDELIX]

Hey there ,

First off, i'm playing a dk tank and i wanted to make macro that can announce when i pop AMS and also use the [Order of the Awakened Battle Standard] ( Item here ) for the group, but the item itself has a 15min CD so I don't want to announce for the party that i just used the item but nothing happend, but instead i would like help to build a macro that actually announces/says something in the party/instance chat IF the item gets used, and if it's on cooldown, it doesn't say anything and just uses AMS.

Thank you in advance.
Sincerely, Gosydelix

AMS : Anti-Magic Shell