If it is a B2/B3, tail rotor authority is the least of your problems. We operate in very high wind conditions and gusting. I emailed EC after a blade sailing incident(lucky no damage-just a lot of noise) due to a gusting wind varying in direction and between 15-30 knots. The answer was that the 350(MR) will easily handle variable gust in speed and direction up to 10 maybe 12 knots in variation. Above that you must try and be nose in the wind or take your chances. As said before we operate in 10-15 knots gusting variation up to 40-50 knot winds and had 1 incident. We do try and ensure we keep that nose into wind as much as possible for start and shutdown. We also do mountain rescues in these wind conditions with the B3 and never had a tail problem despite not being nose in the wind.