Single Click Tanking!?

[secutanudu]

Is there a way to have a macro to prioritize attacks and do whichever one is highest on the priority list and ready to be used (ie. not on cooldown)?

I would like a macro that will cast one of the following, basically whichever is highest on the list and available/not on cooldown:

Defensive Stance (If not in def stance)
Revenge
Shield Block
Sunder Armor
Heroic Strike