I am basically using default settings. For N64 de-blur you can use the 320×240 optimized settings http://junkerhq.net/xrgb/index.php?title=Optimal_timings. Adjust sampling phase until everything is sharp. For line5X de-blur you need to set the resolution to 1600×1200 or use 256×240 optimized mode otherwise you’ll get a black screen.
The image you posted is a heavily compressed and downscaled jpg. You should post a raw png capture. Imgur.com works well for that.
Here is a line4x capture of Majora’s mask:
This is line4x 320×240 optimized capture: