That is the worst idea ever, as far as I'm concerned (the one at a time thing)
Also, there's a write up in that same magazine about WIPING OFF AND REUSING THE FUCKING HEAD GASKET!
Personally, I feel that if you lose torque on a MLS head gasket at any point in the gasket, when it's re torqued, what's to say that something hasn't seeped between the layers of gasket, or the RA of the EXACT SPOT that you're compressing down NOW is the same as the RA of the spot that was on that gasket when you undid the head bolt.
That made sense in my head, but it looks like shit, once I've got it written out.
I hope it's clear enough.