How many oGCD can I press at once?

[Rongway]

I believe you can set up a Macro to use an oGCD 0.5 seconds after using a previous oGCD.

So you can hit the GCD, hit you button for using 2 oGCD's back to back, then hit your next button for your next GCD.
In theory, that would cut back 1 button press.

I am not very good with Macros though and never really use them so this might just be wrong too.

Nevermind the ten year necro; the necroing post is wrong.

You cannot write a macro to activate two oGCD actions with 0.5s between them. You cannot wait fractional seconds in a macro. You can verify that fractional waits get rounded to the nearest whole number of seconds using this macro:

/mlock
/cd 6
/wait 5.5
/e <se.9>
/wait 3
/cd 6
/wait 6.4
/e <se.9> <wait.3>
/cd 6 <wait.5.5>
/e <se.9> <wait.3>
/cd 6 <wait.6.4>
/e <se.9>

This macro starts a 6 second countdown and tries to wait 5.5 or 6.4 seconds before playing a sound effect. The countdowns will end at the same time that the sound effects trigger, 6.0s later, despite the attempts to wait 5.5 or 6.4 seconds.