I haven't seen one written specifically for a necro. You should probably try the macro Crystane wrote for his wizard and bard. Sure, you'll need to edit spells, change what AAs to use, and add a couple things for the pet but other than that you should be good. If you don't have access to fire you can look through the code and pick out the part that chooses targets and change that to your fav zones mob names. Once you have it all set up, you'll be glad you spent the time on it.
I was lucky enough to be able to play with Crystane's macro before he released it and ran perfect for me after I got it set up. I'd recommend giving it a shot.
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