Good logical deduction. They could be also from Alexander’s armies?
That doesn't rule out a Balkan language showing up, but it's more likely that Balkan language would have already been transplanted (along with the women) to the East by the Persians, and then again by Al Iskander.
So, a double-whammy.
Rather like Hungarian ~ which has several major roots. The Dravidian component had to have been transplanted to a number of places first because that is one big hike! Or sled ride, or maybe donkey trip, or goat wagon trek!
The Phrygian religion included the cult of the Great Mother goddess Cybele, served by priests who castrated themselves.
Midas was a king of Phrygia. Maybe they should look for ruins of ancient muffler shops in this part of Pakistan.
There are more than 70 known inscriptions in Old Phrygian from the 8th to 4th centuries B.C., and about 110 in Late Phrygian from the 2nd and 3rd centuries A.D. The language seems to have died out about the 5th or 6th century.