I like the "the more you put effort, the more you extract" idea which is in the mod description. However, for lead processing there seems to be a balancing error which makes level 2 and 3 processing chains obsolete on its own without the use of modules (which by the way are not available at that stage) and without further processing.
I tested the following setups:
A) 600 ore -> foundry (hot air smelting)-> 300 plates
B) 600 ore -> automated screener (grade 1 lead) -> foundry (hot air smelting) -> 300 plates
C) 600 ore -> automated screener (grade 1 lead) -> impact crusher (grade 2 lead) <-> automated screener (grade 3 lead) -> secondary crusher (lead dust) -> electric arc furnace (molten lead) -> casting unit -> 200 plates + 3 lead dust + 96 molten lead = 271.25 plates
The math is: 3 lead dust = 3/4 x 62 molten lead = 46.5 molten lead; which makes a total of 142.5 molten lead = 142.5/100 x 50 plates = 71.25 plates
So we have for A) and B) a ratio of 2:1 (50% yield) and for C) we have 2.21:1 (45.2% yield). With helmod the calculated yield for C) is even lower (44.3%). So the recipe is more effort, more machines, more energy while investing another ~43 Coke, ~17 Borax and ~6 Castings (using 600 ore), so totally not worth it.
The recipes should be reworked to properly fit in the philosophy of the mod.
Ninja-Edit: Mods are all up to date as of today (Py Raw Ores 1.8.6), using full Py-Suite + QoL, fixed typos