Jesus' prayer in this regard was directed toward the Roman soldiers, the executioners, who were carrying out official orders and who were truly ignorant. His sentence upon his accusers was much different: "Woe unto you!"
Actually #10 is the best advice. Forgiveness is more about the forgiver than the person being forgiven.
Letting God settle the score is always best. He says to leave it to him and he will take care of it. I have way too many of my own issues that need forgiveness to worry about getting even.
Always keeping our eyes on Eternity is the best way to deal with character assasination.