This new metric put me very much in a Cost mindset, because the entire question is Access Points.  With no consuming glyphs required and a multiatom input, theory says we only need 2.  We need to access input and output, and literally all else can be done remotely.  This sets a theory min MechA of 3.

But as with all new metrics, I need to iterate in order to understand it.  I began the easy way, with half-access debonder and full-access bonder, at MechA6.  That showed me some ideas, and I soon built this MechA5, with full bonder access.

Unfortunately, I did not see a method for achieving 4 until Friday, and I did not have time to program it to completion.  I am certain it is possible, though.

I suspect a few wizards will show us true min, at 3, but I cannot fathom how to approach it.  Here's hoping I get another crack at this metric someday!