Xnr, I don't fly in Canada, don't intend to ever get close to Canada, therefore I'm not worried about legalities of Cat A landings. I don't intend to ever again venture north of the Red River (the one our President patrolled during the Vietnam conflict as a member of the Texas Air National Guard, watching for invaders from the north). It just gets too cold for me.
That said, I know that the S76A++ & 412 can be landed single engine to a platform. I've practiced it both in the sim & in the aircraft. You're likely to get a little movement at high gross weights, but a few feet is normally acceptable, if you planned the approach correctly. The S76C+ has a 'training mode' that allows restricting the power to single-engine levels for practice.