The following is a list of macros that are suitible for Warriors.
I made this macro as per request, I think it works, though i only tryed it on my 17 warrior. Let me know if you have any problems. Clicking once changes your stance to Battle Stance, if you're not in it. If you've clicked it once or were already in battle stance, it should hit Overpower. One more click should put you in Berserker stance. Enjoy ^_^