Robbie was quite clear in telling us that sending crew leeward in light wind was pointless when going upwind. I'm not going to argue with him...his record is much better than mine, and most everyone else here as well.
Robbie's mostly a T sailor? Light-air techniques vary from boat to boat just as medium- and heavy-air techniques do. My metric Nacras need to be sailed bows-down, but the 20 needs to have the leeward bow just touching the water. So it varies. Good luck.