In my opinion you cant beat a good kill squad @ th9. There is too much unnecessary risk with leaving the enemy AQ up and depending on poisons to kill the clan castle in an air raid. Maybe you can get away with it as a th10 hitting a th9 on a regular basis with lvl 3 hounds, but with the addition of the second airsweeper, straight lavaloon can be really hard to pull off on a quality base.