Did anyone have a hard time with the Inner Sanctum? How did you beat it?

This is the one with the statues right?

Summon a planetar or deva. Have a fighter waiting at the door to take care of the drow guards that come. Then take someone to keep backstabbing every statue that animates. Sendai herself is a wuss. Other people stand by watching. Occasional smite spell or heal from planetar.