Also, I'm not sure why the level Pet says 10+. I just did it with a level 1 pet and had no issues whatsoever. The Sandstorm debuff worked perfectly in Turn 2 blocking all of the damage. Maybe I just got lucky? (shrug)
Crush is only 90% to hit once your Anubisath Idol casts Sandstorm in Round 1. Still, with only a 10% chance to miss Crush hits enough times so that your Anubisath doesn't usually die, but indeed solos the three rats. I do recommend using Deflect as suggested by "Anonymou" below.