Another ECF that many will present as holding PST is Justin Martyr. Here is what is typically offered as PST:
“If, then, the Father of all wished His Christ for the whole human family to take upon Him the curses of all, knowing that, after He had been crucified and was dead, He would raise Him up, why do you argue about Him,who submitted to suffer these things according to the Father’s will, as if He were accursed, and do not rather bewail yourselves? For although HisFather caused Him to suffer these things in behalf of the human family.
Here is a broader context:
“Nay, more than this, you suppose that He was crucified as hostile to and cursed by God, which supposition is the product of your most irrational mind. For though you have the means of understanding that this man is Christ from the signs given by Moses, yet you will not; but, in addition, fancying that we can have no arguments, you put whatever question comes into your minds, while you yourselves are at a loss for arguments whenever you meet with some firmly established Christian. Just as God commanded the sign to be made by the brazen serpent, and yet He is blameless; even so, though a curse lies in the law against persons who are crucified, yet no curse lies on the Christ of God, by whom all that have committed things worthy of a curse are saved. For the whole human race will be found to be under a curse. For it is written in the law of Moses, Cursed is every one that continueth not in all things that are written in the book of the law to do them.’ And no one has accurately done all, nor will you venture to deny this; but some more and some less than others have observed the ordinances enjoined. But if those who are under this law appear to be under a curse for not having observed all the requirements, how much more shall all the nations appear to be under a curse who practise idolatry, who seduce youths, and commit other crimes? If, then, the Father of all wished His Christ for the whole human family to take upon Him the curses of all, knowing that, after He had been crucified and was dead, He would raise Him up, why do you argue about Him, who submitted to suffer these things according to the Father's will, as if He were accursed, and do not rather bewail yourselves? For although His Father caused Him to suffer these things in behalf of the human family, yet you did not commit the deed as in obedience to the will of God. For you did not practice piety when you slew the prophets. And let none of you say: If His Father wished Him to suffer this, in order that by His stripes the human race might be healed, we have done no wrong. If, indeed, you repent of your sins, and recognize Him to be Christ, and observe His commandments, then you may assert this; for, as I have said before, remission of sins shall be yours. But if you curse Him and them that believe on Him, and, when you have the power, put them to death, how is it possible that requisition shall not be made of you, as of unrighteous and sinful men, altogether hard-hearted and without understanding, because you laid your hands on Him?”
Martyr, like Eusebius, views the atonement not for individual sinners being saved but for the entire human race. On the Cross Jesus is not bearing the punishments for individuals, but instead he is paying the consequences of sin in the flesh for the entire human race. This is a common aspect through many theories of atonement (most theories also contain penal and substitution aspects).
"For the statement in the law, 'Cursed is every one that hangeth on a tree,' confirms our hope which depends on the crucified Christ, not because He who has been crucified is cursed by God, but because God foretold that which would be done by you all, and by those like to your, who do not know that this is He who existed before all, who is the eternal Priest of God, and King, and Christ. And you clearly see that this has come to pass. For you curse in your synagogues all those who are called from Him Christians; and other nations effectively carry out the curse, putting to death those who simply confess themselves to be Christians; to all of whom we say, you are our brethren; rather recognize the truth of God…. Now I will demonstrate to you that the whole Psalm [Psalm 22] refers thus to Christ, by the words which I shall again explain…. 'O God, my God, why hast Thou forsaken me?' And what follows: 'The words of my transgressions are far from my salvation. O my God, I will cry to Thee in the day-time, and Thou wilt not hear; and in the night-season, and it is not for want of understanding in me.' These, as well as the things which He was to do, were spoken. For on the day on which He was to be crucified, having taken three of His disciples to the hill called Olivet, situated opposite to the temple in Jerusalem, He prayed in these words: 'Father, if it be possible, let this cup pass from me.' … Even as there was no ignorance on God's part when He asked Adam where he was, or asked Cain where Abel was; but [it was done] to convince each what kind of man he was, and in order that through the record [of Scripture] we might have a knowledge of all: so likewise Christ declared that ignorance was not on His side, but on theirs, who thought that He was not the Christ, but fancied they would put Him to death, and that He, like some common mortal, would remain in Hades…. For we who believe on Him are everywhere a reproach, 'despised of the people;' for, rejected and dishonored by your nation, He suffered those indignities which you planned against Him. And the following: 'All they that see me laughed me to scorn; they spake with the lips, they shook the head: He trusted in the Lord; let Him deliver him, since he desires Him;' this likewise He foretold should happen to Him. For they that saw Him crucified shook their heads each one of them, and distorted their lips, and twisting their noses to each other, they spake in mockery the words which are recorded in the memoirs of His apostles: 'He said he was the Son of God: let him come down; let God save him…. He prophesied the things which do exist, and which happen to Him. For the Father had decreed that He whom He had begotten should be put to death, but not before He had grown to manhood, and proclaimed the word which proceeded from Him. '”
(Martyr, Dialogue with Trypho)
Martyr does not present a separation from God here, paying a spiritual debt. Instead Jesus is fulfilling the entire Psalm (Martyr goes into much detail verse by verse). The cry “My God, my God” was one crying for deliverance – and here Martyr says it was not actually for God to deliver him (for Jesus knew He would) but for the benefit of those listening to declare that he was fulfilling what was prophesized and evidence to the Jews that He was indeed the Christ.