actionbarsaver lets you save and restore the contentt of your actionbars: i.e. which spell belongs to what slot
just /abs save elepvp
/abs save elepve
/abs restore elepvp
/abs restore elepve
...
bartender profiles let you save the layout of your actionbars, how small, how many slots, etc ..
you can easily configure it for one 'slave', and then copy it to the profile folder of the others

make sure to make a new profile when you going to change something, and then just do 'copy from profile'
giving your profiles clear names is almost a necessity if you don't want to fuck up sooner or later