RPM droop on Cat A procedures.
The most important part of the issue is to ensure that you have all the available engine power being used. The only way to ensure this is to droop the rotor from the AEO setting. If you are using 102% or 100%, whatever, if the rotor is still at that RPM, you aren't using all available power. The range provided is optimum for aircraft on the heavier end of the scale. Comparing AEO hover & takeoff power settings to OEI continuous & 2.5 minute ranges will give you an idea, prior to takeoff, what you can expect if an engine fails during the takeoff. If you are using less than max continuous OEI power for your takeoff, you will likely have to increase power to achieve some droop.