Assumption:

Argument 1:

1. ī historically preceded other affixes

   • ✘ As it speaks of CE, the possessive suffixes are not part of the list of ‘other affixes’.

Argument 2:

1. ī is attested to precede other affixes:
   • híniryannar, hildinyar. [VT44/33, PE17/103]
     • ✘ This word can be with stem híni- or pluralia tantum.
   • lucindillomman and similar (VT43/20) of singular lucindo that is not an -i stem.
     • ✘ Due to the suffix order case-possession, the example does not in fact support that -i- would precede in reverse order.

Counter-assumption:

Argument:

1. ī is attested to follow other affixes
   • mánte ‘their hands’, likely from mā-nta-ī (PE17/161).