My personal preferences:
I understand the idea of having Slavorg in this book, but I have to say that when I put together a book with a number of smaller animals and Slavorg, I never felt like I had him out long enough, and so many other creatures died before having him out that he had too little support. It might just be the way that I played... I don't know... just sharing my experiences with him. I tend to leave him out in these kinds of books now.
You might want to put in a swarm or two... they are great for getting past armor. The Lifetree, mentioned earlier, would be especially important if you had them.
I would rather have a Rock and a Boulder than three Rocks. Also, I might turn one of the Minor Heals into two Mends or a Group Mend or somesuch... or turn them into a Heal, if both are intended for use on the BM. I get the mana efficiency, but you get more healing in a single action... just my preference.