Which technique do you prefer, and why?
In a lightly loaded B407 at lower altitudes, max power will likely have you exceeding the 2000 fpm ROC red line and things will be happening fast. I find that 80-85% TRQ usually gives a brisk, manageable ROC and is well below max power. Somewhat more power may be necessary with a heavier load, but have never needed anywhere near max.
A related consideration is the takeoff profile on a max perf takeoff. The FAA RFH technique gets the helicopter moving forward right away. My very seasonsed instructor has taught me not to do it this way. He wants to preserve the space ahead of the helo for an emergency return in the event of an engine failure, or unanticipated change in wind, etc, and recommends a towering TO until obstacles are cleared, and then moving forward. Each technique involves tradeoffs. Opinions?