Is it permissible to stipulate memorizing the Quran or proving repentance instead of the blood money for forgiving the intentional killer?

The guardians of a victim of intentional, wrongful killing have the choice between retribution (qisas), blood money (diyah), or forgiveness. For qisas to be carried out, all those entitled to the blood must agree. Qisas is waived if any one of them, being an adult and sane, forgives. If any of the heirs are minors or insane, the killer is detained until they reach maturity or sanity. If some of the heirs forgive the diyah, the right of those who did not forgive is not waived. The guardians are not permitted to forgive the diyah if the deceased had a debt. Forgiving a killer known for evil and corruption is not superior; rather, qisas against them might be better for achieving reform. It is permissible to stipulate the offender's repentance or memorization of the Qur'an in exchange for forgiveness, due to the benefit and encouragement of righteousness therein.