Right on the money.
To be clear, here's how you set that up, assuming you want your skill chain or cast sequence to be on your "x" button on your controller. For the purposes of this example I'll use the PLD aggro skill chain.
step 1: Make yor #1 hotbar just the way you like it, but leaving the "X" spot blank for that skill chain.*
step 2: Use the command line "/chotbar copy current 1 current 2"
step 3: Use the command line "/chotbar copy current 1 current 3"
step 4: Make the following macro in the user macro section:
a.
/micon "fast blade"
/ac "fast blade"
/chotbar change 2
b.
/micon "savage blade"
/ac "savage blade"
/chotbar change 3
c.
/micon "rage of halone"
/ac "rage of halone"
/chotbar change 1
step 5: Place these macros in the blank "x" spaces on your chotbar; a. on 1, b. on 2, c. on 3.
step 6: Check your work. Always verify your chotbars are switching appropriately, then test your skill chain on a slightly lower level mob, so you can get the "feel" for timing them properly.
* I suggest having an "interrupt" button that returns you to the start point. This is so, if for whatever reason, your skill chain was ruined you can start again with minimal loss. Otherwise you'll have to fast forward the "x" button a time or two to reset your chain to the beginning.
Since the 16 skills you place on these 3 hotbars willl be pretty static, I also recommend the use of the "double shoulder press" chotbar for not often used, but very useful skills. This is the best way to have access to skills without hard switching your hotbar and screwing up the rotation of your new sequenced skills.
Lastly, I suggest going here:
http://forum.square-enix.com/ffxiv/t...os-with-hotbar
And upvoting the suggestion and leaving a positive comment. This would enable everything I said above but without having to switch hotbars. The action change would come from switching macros on a single hotbar.