Toggle your Offense/Defense stance with one keystroke : EverQuest 2 General Discussions

Create a macro with the following line

/: ;useability <Exact Spelling of Offense Stance> ;useability <Exact Spelling of Defense Stance> ;useability <Exact Spelling of Offense Stance>

Then just assign the macro icon to a hot key. Each time you hit the hotkey, you'll switch stances.