No reason not to use macros for oGCDs.

Here are my macros:

# generic defensive macro
/ac Dark Dance
/ac Shadowskin
/ac Shadow Wall

# button saver reprisal
/ac Reprisal
/ac Carve and Spit

# mana regen
/ac Blood Weapon
/ac Blood Price

You press each of these ONCE when you need to use them.