All perfect praise be to Allah, The Lord of The Worlds, and may His peace and blessings be upon our Prophet Mohammad and upon all his family and companions.
The above individuals are obligated to pay the Diyah to the heirs of the person that they have caused to die, namely his wife, children, father, and mother. Moreover, it is forbidden for anyone to waive the share of the minors (Under the age of puberty) in their father`s Diyah because Islam forbids donating the wealth of minors. As for the heirs who have reached the age of puberty, they are free to waive their share in that Diyah, if they want to. In addition, the fact that the deceased had suffered from the above ailments doesn't cut down the amount of the Diyah due on those who led to his death. And Allah Knows Best.