Your argument seems an empty sack to me.
Ephesians 2:5
even when we were dead in our wrongdoings, made us alive together
with Christ (by grace you have been saved),
The phrase "together with Christ" comes from a root meaning to be in "union." And what was our status when put in union, we were dead in our sins.
The bible means what it says.
An empty sack, eh? Interesting.
Van, even if you are right on your position, which you are not, Eph 2:5 would not be a good place to prove it. Why? because the context will not allow your interpretation , if you are honest about the context. This passage does not teach that a sinner is "with Christ" when he is born again. Our conversation was not about being "with" Christ anyways, but "in" Christ.
You are not trying to understand these passages in the context of the transitory nature of the times in which they were written and the obvious change in God's dealing with both Jews and gentiles since the crucifixion and resurrection of Jesus Christ, which at the time of writing of Ephesians is 30 years later. He is letting the gentiles know in this letter to a representative gentile church that God has revealed what Paul calls, the "mystery of Christ," meaning a truth that has been hidden in God and only now revealed by the Spirit of God, and it concerns the gentiles and the Jews and his purpose in this age of forming the body of Christ, the church, with believers from both of these people groups . (see note A below for a definition of the mystery of Christ) Where the words, both, also, together, and such like is in the text, it is referring to Jews and gentiles. Where a distinction is made you will see the contrasting term, Ye and us, yours and ours, etc. For an example look here.
12 That we should be to the praise of his glory, who first trusted in Christ. (See note B below).
13 In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,
I have noticed that the theme of Ephesians is never mentioned by people who use the verse for proof texting. The theme is the mystery of Christ and the purpose of this epistle is to make us understand the historical narrative in the book of Acts where God first began giving his Spirit to the remnant of Jewish believers and 10 years later added the gentiles because he is forming a bride for his son. How would we know what God is doing if we were not able to see his plan play out in real time and then have the apostle Paul explain it to us in his 13 letters to the churches? (see Note C below)
NOTE A
4 Whereby, when ye read, ye may understand my knowledge in the mystery of Christ)
5 Which in other ages was not made known unto the sons of men, as it is now revealed unto his holy apostles and prophets by the Spirit;
Verse 6 is the definition of the mystery of Christ.
6 That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel:
7 Whereof I was made a minister, according to the gift of the grace of God given unto me by the effectual working of his power.
NOTE B
Acts 3:25 Ye are the children of the prophets, and of the covenant which God made with our fathers, saying unto Abraham, And in thy seed shall all the kindreds of the earth be blessed. 26 Unto you first God, having raised up his Son Jesus, sent him to bless you, in turning away every one of you from his iniquities.
16 For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
NOTE C
10 That in the dispensation of the fulness of times he might gather together in one all things in Christ, both which are in heaven, and which are on earth; even in him:
11 In whom also we have obtained an inheritance, being predestinated according to the purpose of him who worketh all things after the counsel of his own will:
12 That we should be to the praise of his glory, who first trusted in Christ. (the we are the Jews. They were first to trust in Christ)
13 In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise, (the ye in this verse are the gentiles who had not previous relationships or promises from God but whom he accepted later with the Jews, who had both)
14 Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory.
8 Unto me, who am less than the least of all saints, is this grace given, that I should preach among the Gentiles the unsearchable riches of Christ;
9 And to make all men see what is the fellowship (Jews and gentiles both in the body) of the mystery, which from the beginning of the world hath been hid in God, who created all things by Jesus Christ:
10 To the intent that now unto the principalities and powers in heavenly places might be known by the church the manifold wisdom of God,
11 According to the eternal purpose which he purposed in Christ Jesus our Lord:
It is not a good idea to proof text using a verse taken out of context. You should be able to see that Eph 2:5 is speaking in the context of the Jews and gentiles being together in the body and therefore being with Christ, the head of the body and therefore we are in the body, not the Spirit, in this context. Your theology on this point seems to be a little off the bubble.
The church of Jesus Christ is the wisdom of God on display for both heavenly beings and men. It is unique to this age, from the resurrection of Christ until the day of the LORD. God is good.