Sequence is provided in scripture, as well as by logical necessity. We have to have been put into Christ before we can be sealed in Christ.
But when we are set apart in Christ we then are saints - those set apart in Christ.
We are chosen individually when God credits our faith as righteousness and transfers us out of the realm of darkness (in Adam) and into the kingdom of His beloved Son, Colossians 1:13. The "sanctification by the Spirit" also refers to God setting us apart in Christ. (2 Thessalonians 2:13) Ditto the "sanctifying work of the Spirit,
1 Peter 1:1-2. Then we have 1 Corinthians 1:30 where God puts us in Christ. And of course we have
Romans 6:1-4:
6 What shall we say then? Are we to continue in sin so that grace may increase? 2 May it never be! How shall we who died to sin still live in it? 3 Or do you not know that
all of us who have been baptized into Christ Jesus have been baptized into His death? 4 Therefore we have been buried with Him through baptism into death, so that as Christ was raised from the dead through the glory of the Father, so we too might walk in newness of life.
John 6:37 All that the Father gives Me will come [be transferred] to Me, and the one who comes to Me I will certainly not cast out.
Note that the result of being given to Christ results in the person being "in Christ" because Christ promises to not cast the person out.
This action by God to give us to Christ is the Spiritual Baptism term of the formula.