The best way to dwnld is to manually search for the sources. If you use force Resume, which can be very effective but, it puts out queries every few mins which, if there's many files that've been resumed can put a lot of stress on your connection quality. You'll also find that your files will be queued for long periods of time, much longer than normal. The Status of such files can be identified by 'Waiting #s for Sources' ends up as 'Awaiting Sources' instead of 'Need More Sources'.
Here's some search & dwnld hints & if you wish to optimise LW for best results,
Hints A (Click on this link) & also
Hints B (Click me too.)