Pol is the bomb!

I had the most luck with the cat nip trick. I dont think I woudl go with Dark Knights for the other 2 characters here though. I woudl go more for speed.

I would definately make sure to cast haste on all my guys. Also, I would be very careful not to have all 3 gals setup with a attack at any 1 point. My thought here is that if you have all 3 girls waiting to attack, Chac could petrify one of them, and the crush them. In the mean time, you are still waiting to attack.

Personally, I would haste my gals. then I would only pick 1 at a time to attack. This way you can soft 1 if they get stoned ( ) and heal with the second one. If the first gal attacks successfully, then assign the second one to attack.

I guess the ultimate goal is to never have 1 girl dead and another stoned.

Let me know where you get stuck. Cat Nip shoudl only take about 6 turns to off Chac.