This could be a lot of fun with Gnarled Horn, which I like to pair with Mounted Champion when my pet solos/tanks an NM. Hopefully the String Shredder can help speed up the fights. That makes your third choice of Atma a little difficult. RR and String Shredder will greatly speed up the fight, but can you afford to lose a defensive/magic defensive Atma and a few Cannibal Blades? It will be fun to play with! ^^