Xnr,
Are you practicing such failures with full right pedal in the air? If so, each time you raise or lower the collective, you change the tail pitch, because the pedal stops are not the pitch stops in most mid to high collective situations. It is not particularly wise to fly this type of practice, I think, and is not in any training guide that I have seen, nor that Sikorsky has approved. Who's training guide are you using?
If such a stuck full right pitch situation took place, autorotate normally, set rpm at 100 with collective, and as you touchdown, you will be at 90 as you cushion. Don't trim the rpm low on descent, you need the rpm to make a nice touchdown. Touchdown nose up on mains first, any nose angle will be helped by wheel drag.