Ok, let's look over your presentation:
This is simply not true. Here is why God is the author no matter what man does in response:
1. God created all things.
2. God sustains all things.
3. God saves out of His good pleasure not because of anything we do and our response does not change that.
These are good.
But you actually don't hold strictly to #3, for by your own statements concerning human volition you grasp on that human volition is the determiner. That a person's own human volition and natural faith they may accept or reject the claim of God upon their life. This is why you hold to "prevenient grace."
4. God devised the plan in which men would be saved.
5. God ordained the boundaries in which men would be saved.
6. Man could not do any of the above.
7. The Father sent His Son to die and be resurrected. No man could do this.
No problem.
8. God's standard for Holy is the measure by which men are redeemed.
The standard for redemption is not what is Holy, but what is proclaimed and assigned Holy (sanctified) by God. Just as the parts of the temple and the high priest were ceremonially sanctified (proclaimed Holy) it was not a measurement, but a title change. That which was unholy proclaimed by God holy. God has proclaimed many things holy, even the ground before Moses at the burning bush, the land around the Sinai Mountain, the vow one makes, ...
It is that proclamation that precedes salvation, not follows. God has already proclaimed ownership, and therefore the person's salvation is not imparted by human volition, but by command of God.
9. Only Jesus could fulfill that standard of Holiness.
This is true as it relates to the Law, for no person is justified by the law.
However, it is also abundantly clear that humankind have no ability to attain such by any action they can muster, be it human derived faith, works, will, or strength of character.
Now right here is where anything meritorious stops regardless of what response, God requires man to do. Since all of the above is true then it cannot be said that man earns his own salvation by believing. Man believing is irrelevant to who gets credit for salvation. The reason is without all of the above all the belief in the world doesn't matter.
Again, taking your statement of face value, then what about the bold statements of prevenient grace in which a person in some manner is lifted into a neutral estate that some human volition of choice can be made to accept or reject the offer of salvation. There is inconsistency between that which you innumerate and such a construct that corporate election and human volition oblige. You may attempt to limit what is considered "meritorious" but to claim such is puffed up authority of little value. The consistency of your posts show that you don't end the discussion, but carry it further.
If you actually stand on the side and proclaim "... it cannot be said that man earns his own salvation," then you are obliged to admit such salvation from the authoring to the finishing is of God through Christ. Such includes even the ability granted to express belief from a core "regenerated" (though I don't really like that term).
Further, salvation is described by God as a free gift. When man believes he is receiving that gift. Since when does the reception of the gift also considered part of the giving. It never is considered part of the giving except by Augustinians to support their errant doctrine.
You ascribe salvation as a "free gift" but then use terms such as humankind must gain the gift by some action. Your "free gift" then is determined upon human action. Therefore, the gift is not truly free for it is dependent and interlinked as one might a contractual relationship between two parties in which remuneration is given for action.
Btw, I don't hold much to Augustine as a person or teaching, be it eschatology or soteriology.
Perhaps a bit of illustration will display the differences between us on this issue:
Typically when one wraps a gift, there also includes some indication of the person for whom the gift is intended. It is specific to that person, and appropriately selected for that person. As one is able, the gift is personally present by handing over the gift and transferring total authority of the gift to that person. Now all that is good for your thinking and view. However salvation is no such gift. It is not even an accurate portrayal.
Rather, salvation is a new creation. In crude terms, it is as that which took place with Mary. The gift, the formation, the preservation, the purpose, the outcome, ... was not of Mary's choosing, rather she was hand picked for a specific purpose.
Where you would portray the gift as if were a present neatly wrapped, I would present that gift is life implanted in the person. Romans quotes Isaiah:
“I have been found by those who did not seek me;
I have shown myself to those who did not ask for me.”