Lev, you have it spot on.
With Mitsus it is very rare to find a coil failure. The igniter is generally what fails. Proper tech for testing them I can not help with since in my 48 years of driving and working on Mitsues the only ignition failure I have had was a bad MSD 6 unit on one of my 2.6L race Colts. That can not be blamed on any Mitsu bits.
Only failure of a mitsu part I have experienced was the 5V power inside the ECU of my DOHC converted Diamante wagon, we were a long way from home in nowheresville Maine. Nothing but tall trees. Luckily once it cooled down it ran.
I am soon going to update my Pajero build over there as well as start a parallel thread here.