There are two ways to do this without experiencing the pitfalls of macroed actions.
A)
Add a button that rewrites the actions assigned to those two slots with /hotbar commands, and then
another button that rewrites them back to their original actions.
B) Storing a second version of the bar elsewhere, and having a macro do an A-B B-C C-A hotbar swap.
In either case, you'll require two button presses that you have to weave into your rotation, whether it's two buttons once each or one button twice... If you really want to explore either of those options I can provide the macros, but I suspect you'd find it more work than it's worth.
B takes only one extra button slot, so I'll give you that one. If you use a controller, use /chotbar instead of /hotbar
Code:
/hotbar copy SMN 1 ACN 1
/hotbar copy ACN 2 SMN 1
/hotbar copy ACN 1 ACN 2
Change the SMN bar number to whichever bar you're using.
Setup:
- Assign your bar as you would for outside of Bahamut
- Place macro on bar (does not have to be the same bar).
- Type the following in your chat box with the appropriate SMN bar number: /hotbar copy SMN 1 ACN 2
- Activate macro once. There should be no visible change -- we just copied your SMN bar to ACN 1, and then overwrote it with ACN 2, which as of the previous step was exactly the same bar.
- Assign your bar as you would for during Bahamut
- Activate macro again. Your bars should change back
From now on, activating the macro should swap between the two bars. Note that if you make changes to one of the bars, you'll have to make the changes on the other version again after swapping.
tl;dr: it's prolly more trouble than it's worth, but there it is if you want to explore the option anyway.