Both people hanging onto the same line. Usually (hopefully) when you capsize, there is wind. If there is wind in excess of 15 knots, you can probably right the boat single handed. If this is possible, have your crew sit on the low hull by the main beam while you right the boat. As the boat starts to come up, your crew should roll right over onto the deck of the boat and be in great shape to get things under control while you get on board.

If there is less than 12, you will definitely require both people leaning out on the boat to right the boat. I (usually being the lighter of the two) usually go out on the daggerboard to get additional righting leverage while my crew would stay on the hull leaning out.

Regardless, be prepared to grab the dolphin striker as the boat comes up, the boat will want to keep rotating and capsize in the opposite direction. It is important that you grab the dolphin striker and lift yourself up using your weight to convince the boat to remain "pointy-side-up". If your crew was able to roll over the hull you probably don't need to worry about this so much.