According to table 1, table 3 and Figure 7 of this paper:
http://www.plasmafocus.net/IPFS/2010 Papers/Energies PP.pdf
Saturation occurs for 1.5MA. So, if you discharge more than 1.5MA, at low voltages, the pinch won’t achieve more than 1MA, and it doesn’t matter what configuration is used.
