But the LM1084 it's the same that ITPS uses and if I join two of them together the dropout don't change, am I wrong? (yes there is the ballistic resistance but is very small 0,015 ohm.. 0,015 ohm x 12 A = 0,18 V | 0.015 ohm is the resistance of two feet of #18 wire)
In my design the PW200 is connected directly to the 12v rail with two LM1084, then the ITPS switch on the system with a relay.
However I'll search for your thread.. 15 regulators of 2A! impressive... 15 small heatsinks or only one very big?