It seems to me that the "strength" of functions isn't all that important, the role is much more important.
i.e. an IEI isn't an IEI because theiris stronger than their
etc., rather it is because
is their base function (and
is their role function, etc.)
So it follows that an IEI might have (or appear to have) weak/strong
etc. etc., but because of their psyche's organisation they are still an IEI regardless.
What do you think?