“I believe you have already been told that the grace you are touting is not God’s Grace...”
All grace is His.
1 Peter 5:10: And the God of all grace, who called you to his eternal glory in Christ, after you have suffered a little while, will himself restore you and make you strong, firm and steadfast.
“...God of all grace”
ALL grace.
And again, what you describe in purgatory is not Grace.