How to advance multiple round-robins together.

Let's say for example, you are planning on taking Nature's Swiftness for your Feral Druid team in Cataclysm.
That gets you five on-demand instant casts.

Looking at the available nature spells, the most likely candidates are:
- Battle Rez
- Cyclone
- Healing Touch



It is easy enough to create one of these, as a round-robin effect within IS Boxer.
For example:

Mapped Key (NS_Healing Touch)
Hotkey: Backspace
Five Steps.
1)
- FTL Assist Me (Target: Current Window)
- Send Keybind (Whatever your macro is on) to Target: Druid A
2)
- FTL Assist Me (Target: Current Window)
- Send Keybind (Whatever your macro is on) to Target: Druid B
3)
- FTL Assist Me (Target: Current Window)
- Send Keybind (Whatever your macro is on) to Target: Druid C
4)
- FTL Assist Me (Target: Current Window)
- Send Keybind (Whatever your macro is on) to Target: Druid D
5)
- FTL Assist Me (Target: Current Window)
- Send Keybind (Whatever your macro is on) to Target: Druid E

Then do the same, for the second spell and the third.



Except, if the first Druid were to cast Nature's Swiftness + Healing Touch...
And one of your team died, you'd want the Nature's Swiftness + Battle Rez to go to Druid B, and not Druid A.

So we modify the mapped keys to include:
Keymap Actions > New Mapped Key Step Action.
And then set it as follows:
- Target: All Windows
- Keymap: General (or wherever our other NS macro is)
- Mapped Key: Other NS Mapped Key
- Step Adjustment: "Set To" and "x"

Assuming we went with three Nature's Swiftness mapped keys, our modified mapped key will be similar to:
Mapped Key (NS_Healing Touch)
Hotkey: Backspace
Five Steps.
1)
- FTL Assist Me (Target: Current Window)
- Send Keybind (Whatever your macro is on) to Target: Druid A
- Mapped Key Step Action - Set NS_Cyclone to Step 2
- Mapped Key Step Action - Set NS_B.Rez to Step 2
2)
- FTL Assist Me (Target: Current Window)
- Send Keybind (Whatever your macro is on) to Target: Druid B
- Mapped Key Step Action - Set NS_Cyclone to Step 3
- Mapped Key Step Action - Set NS_B.Rez to Step 3
3)
- FTL Assist Me (Target: Current Window)
- Send Keybind (Whatever your macro is on) to Target: Druid C
- Mapped Key Step Action - Set NS_Cyclone to Step 4
- Mapped Key Step Action - Set NS_B.Rez to Step 4
4)
- FTL Assist Me (Target: Current Window)
- Send Keybind (Whatever your macro is on) to Target: Druid D
- Mapped Key Step Action - Set NS_Cyclone to Step 5
- Mapped Key Step Action - Set NS_B.Rez to Step 5
5)
- FTL Assist Me (Target: Current Window)
- Send Keybind (Whatever your macro is on) to Target: Druid E
- Mapped Key Step Action - Set NS_Cyclone to Step 1
- Mapped Key Step Action - Set NS_B.Rez to Step 1

Which gets us three mapped keys, each performing a round-robin action.
Each mapped key consumes a Nature's Swiftness for the current Druid.
And then advances the other two to the next Step.
Which means, even if we use a different NS Mapped Key, the next cast should also be instant on the first press.