My view here is that you don’t just want to stop the yawing, the goal is to minimize pressure on the anchor. In that case best to keep the ship pointed as straight into the wind as possible as that is going to expose the minimum surface area to the wind.
The one time I had to do this I though that the best place for the tug was made fast aft as the pivot point is going to be near the hawsepipe. But for some reason the tug refused to put a line up aft and stayed forward instead. This arrangement proved to be difficult to control the heading and motion of the ship but we did well enough not to drag, or at least not far. We did not put our beam to the wind which is the high risk situation.
In the case of the Viking Sky it may have been workable in theory but in practice given the wind and seas likely very difficult. I would be very surprised if it had been tried. Maybe a last ditch effort? The wild card would be the estimated time to have an engine on-line.