The proto Persian Semitic Iranians, The Elamites. Where they close to Assyrians?

[Nigel]

Was there an overlap with Iraqi Semitic speakers?

Where they of the greater Mesopotamian peoples?

[Humanist]

Based strictly on geography, they likely shared more genetically with Babylonians, than Middle and Neo era Assyrians.

[Nigel]

How did the Persians and Medes mingle with them?

[Cherkess]

Probably closer to the Babylonians who have long vanished both genetically and culturally. There remains are only to be remembered.