Here, briefly, is another thought on the temporality of the subordination of Jesus Christ as God's Son.
As I understand eternal subordinationism (ES) the Son is subordinate to the Father and the Spirit to the Father and the Son (with debate, naturally, between Western and Eastern versions of ES, as to whether the Spirit is subordinate to the Father alone, or to Father and Son).
How then to explain Luke 4:1 and parallels:
'And Jesus, full of the Holy Spirit, returned from the Jordan and was led by the Spirit in the wilderness'?
Incidentally, in the same gospel story Jesus submits himself to the devil, allowing the latter to take him to Jerusalem (4:9).
The point, of course, is not that Jesus is eternally subordinate to the Spirit, or subordinate in any significant way to the devil. Rather that Scripture speaking about the earthly dimensions of the life and mission of the incarnate Son speaks in a manner consistent with the human life of the Son as a human agent of God's purposes (e.g. 'full of the Spirit' and 'led by the Spirit'). But this language is not intended to say anything about the eternal life of the Son in the being of God.