If Str is no concern, ofc.
If it costs you Life, no.
If you play PvP against mostly melee chars, maybe.
If you play PvP against casters, definitly not.
I shouldn't have to say this... But I thought it was pretty obvious when I said "objectively archon is better" I was referring to the choice between the 2 armors with the understanding that he said "strength didn't matter".
Archon isn't always better than mage plate in every situation... But in this one, archon is objectively better.