Hey Brico.

I did kind of a multi layer approach. The Jist of it is, from my main I have a key I hit which will set a raid icon over my current target. Then, on that SAME Key for Mage 1, I have a macro that assists me and sets that target as its focus target. I have this same thing setup for Mage 2, so I target a mob with my main (that I want to sheep with Mage 1) and hit the 'get focus Mage 1' button, which sets up the raid icon over it, and sets it as focus. Then, I target another mob, hit the second key, setting icon and focus for Mage 2. Then, I have a sheep button that has both mages poly their focus targets.

So, on my main system I have 2 macros :

(Set Focus for Mage 1)
/script SetRaidTarget('target', 1);

(Set Focus for Mage 2)
/script SetRaidTarget('target', 2);

Then, on Mages 1 and 2, on the same key that is set focus for that Mage, I have a macro :

/assist Ololo
/focus
/say Gonna Sheep {sqaure}

And then for the Poly Macro I have :

/cast [target=focus] Polymorph;


That way, no matter what Im doing in battle, to resheep I just hit that poly key, and they resheep their focus targets.

hope this helps!