yo welcome and id go with somthing like this on shammys

main toon action bar slot 1
lighting ball

clone toon action bar slot 1
macro /assist maintoon /cast lighting bolt (rank 1)

ez atk set up

asfor a follow download the mod twoboxtoolkit
set your main toon as the leader in your clones addon it will tell u when follow breaks
make a second macro
<macro /follow maintoon>
this way u have no need to look at your other toon
two box tool kit will tell you
low mana
low hp
relay chat/trade/guild/wisper
prity much any thange u need to know about whats going on with him
if your playing on 1 screen i sajest doing a maximizer split screen for a 2box
up to you hope i helpet cheers