Here is a non-illegal workaround. This macro advances the combo on a timer. The first press is a macro but it will replace that slot with raw action buttons so there is no delay as with typical macros. You can activate this macro even during animation lock; however, due to the /mlock you cannot activate any other macros while this macro is running. If your combo is interrupted due to downtime, it will continue to advance regardless, so you will lose DPS if you cannot maintain uptime unless you also have the rest of the combo on your bar anyway.
Code:
/mlock
/hotbar copy current BARNUM share BARNUM
/hotbar action "ACTION 1 NAME" BARNUM SLOTNUM <wait.2>
/hotbar action "ACTION 2 NAME" BARNUM SLOTNUM <wait.2>
/hotbar action "ACTION 3 NAME" BARNUM SLOTNUM <wait.2>
/hotbar copy share BARNUM current BARNUM
/micon "ACTION 1 NAME"
Ex.: Rage of Halone combo on bar 1 slot 2:
Code:
/mlock
/hotbar copy current 1 share 1
/hotbar action "Fast Blade" 1 2 <wait.2>
/hotbar action "Riot Blade" 1 2 <wait.2>
/hotbar action "Rage of Halone" 1 2 <wait.2>
/hotbar copy share 1 current 1
/micon "Fast Blade"
Replace BARNUM and SLOTNUM with the bar and slot numbers. Adjust the wait times if the actions are changing too early or too late, but note you can only wait in whole seconds. The first copy line backs up your bar before it starts rewriting the action slot. The last copy line restores the macro to it when the macro finishes. If using cross hotbars type this in game to see the changes you need to make:
/? chotbar