Not sure if anyone is really interested in the stats but I've just finished breaksynthing four levels of Shrimp Lanterns, and I haven't seen any actual stats on exactly how much Overwhelming elemental energy saves you in materials, so here goes.
Shrimp Lanterns 73 cap Goldsmithing (45 Alchemy, 31 Smithing)
Levels 69.0-73.0
Total Synths: 125
Tin Ingots Lost: 61 (48.8%)
Beeswax Lost: 54 (43.2%)
Moblin Putty Lost: 55 (44.0%)
Moblumin Sheet Lost: 53 (42.4%)
Total Lost Ingredients 223/500 = 44.6%