Agree anf for the Illyrian theory. Actually according to an ancient tradition, the town of Pylon near lake Lychnitis (Achris or Ochrida), formed the meeting point of the boundaries of Macedonia and Illyria.
But because we speak for 4th B.C. the architecture of tha period is known
The temples (Therme, Neapolis) and public buildings (Aigai, Pella) follow the architectural trends of southern Greece, in particular of the Ionic colonies and the Aegean islands.
The selectivity and originality with which features borrowed from the Ionic and Doric styles are combined and incorporated are characteristic of the public buildings erected in the ancient and new walled cities of the Macedonian kingdom.
When we have more evidence easy we will concluse if this ancient wall or part belongs in Ionic and Doric styles or we have something new architectural trends.
Will See