I have this setup with SCH.
The way this works is you setup your base bar, minus the ability you want to change.
And then type..
/chotbar copy SCH 1 SCH 2
/chotbar copy SCH 1 SCH 3
Your first 3 pages are now identical.
Your first page would put this in the "rotational" spot.
/macroicon "Bio II"
/ac "Bio II" <t>
/wait 1.5
/chotbar change 2
Second page, same spot
/macroicon "Miasma"
/ac "Miasma" <t>
/wait 1.5
/chotbar change 3
Third bar
/macroicon "Bio"
/ac "Bio" <t>
/wait 1.5
/chotbar change 1