I'd agree with the cutting the size of the in-flight mag and reducing the potable water uplift to 60% (I'm sure their study reveals that the utilization is below 60%).

But when it comes to employment of only female cabin crew, then I'd say why not also only female cockpit crew and in the worst case scenario, employ male flight deck. Also, try and carry only female passengers as far as possible, they weigh far less too ;o)