Long ago and far away, when the UH1 was cutting-edge helicopter technology, we used to bet a beer on who could take off with the least power. Like lying, you didn't want to be the first to go, since burning off some fuel in the (often very close) pattern made it easier. We never hovered, we just got light on the skids and started dragging forward until we lifted off. Not a recommended technique in most cases, but sometimes military necessity demanded getting airborne with the maximum payload, book gross weight limits be damned. Hover power was not required, much less 10% above that. I still benefit from that practice, because it demanded a smooth control touch and patience. I don't remember any formal training that called for a specific amount of torque, at least in U.S. Army schools. After flight school, we started learning to fly for real. In the GOM, we regularly take off with barely hover power, both from the beach and from platforms/rigs. The same techniques are called for, but we do hover before takeoff.
As for max power on takeoff, I think this illustrates yet another difference between planks and real aircraft. Planks depend entirely on airpseed and altitude. Helicopters don't. As long as I have sufficient rotor RPM, I have a good chance of a survivable landing anywhere. The higher the pitch, the lower my chances of maintaining RPM, or conversely, the lower the pitch, the easier it usually is to keep the RPM in an emergency. My technique is to pull whatever power I feel necessary at the time, and no more, thus keeping stress on the engines, transmission, tail rotor, and everything else at a minimum. I want everything to keep working all the way. You are certainly free to use whatever technique you prefer in your cockpit.