So you will roll an artifact up to lelvel 16, to see if you get a quad roll, no matter if it's a flat DEF or whatever, and then use ore which will change not only the substat but the main as well? I haven't crunched the numbers but this seems counter intuititive.
My CritDamg gloves with quad roll on flat def when to flat roll on SPD, but now they are Flat Def gloves with quad speed!
I just don't see taking junk to level 16 just to see if it's a quad roll on a junk piece and then might maybe have lighning strike and make it better.
By that logic you need to roll up every legendary piece, flat mains and all, to see if they roll up quads on junk subs.
To many variables for this to be anything other than a shot in the dark.