Only macro I use on tank in combat right now is
/ac "Fight or Flight" <wait.1>
/ac "Bloodbath"
I have low SS on my pld, and can fit both in a gdc, so why not?

I find macroing text to abilities (berserk/hallowed/provoke) causes issues when you need them to go off *right now*, so I don't use them. An "I'm pulling in XX" is fine