Arcal 76,
You are not alone in your situation where the weight of the aircraft and the environmental conditions often preclude Cat A operations. I worked in the simulator with a customer whose main task is to haul heavy loads of platinum out of helipads surrounded by a security fence in mountainous areas of hot countries. We practised single engine failures after take-off in this condition, and together we worked out a profile that gives the least violent crash. There was no way to avoid the crash if the failure came at the wrong moment, but it was possible to get over the fence and crash in a relatively open area. If you find yourself operating in similar conditions, thats the reality you will have to plan for, and I guess that is what your company is trying to do with its invented Cat B profile. It would be interesting to test how your profile works with an engine failure in the simulator!