1.Your prayers are heard as long as you live. Once one dies and if he goes to Hell then he can not do much about himself and his condition depending a lot on people on Earth
2.Until the last judgement, God has mercy and people can be saved from Hell, even the people that are now temporaly in Hell. The judgement until last judgement is temporary and can be overturned either way either by the effects of one's deeds in the future or by effect of humanity or other living people that can pray for these departed. For example if anyone went to Hell however he did built a well and people could get water for free even after his death, he can be saved by the efects of this deed even if at the partciular judgement he was sent to Hell. Or if anyobody prays for somebody in Hell, the one in Hell may be saved. For example one may pray to Jesus to baptize and commune and confess somebody from Hell so the one in Hell may be saved.
3.People on Earth can pray for people in Hell in their names and these prayers are like the people in Hell did pray. After Jesus did come people can pray for departed people and can ask God to see them and their condition and these prayers are answered.
4.Nobody should be left behind.
5.Things can be transfered in after life by giving them to the poor. Also things can be give to the poor in the name of departed and will count as the departed gave them. The story abpout St Phanorious mother really makes the point and I did like it http://www.orthodox.net/recipes/st-phanourios-story-prayer-to-bread-recipes.html
There are other stories as well that can teach us a bunch.
6.Some Eastern Orthodox people can see and speak with God from this life so they can ask about this issue.
7.The law of God say that whatever you do to your neighbour this is what you get so if you fight for a man in prison Hell, if in prison yourself, you can get help on the account of the law.
8.The things we don't know, we don't know so through prayer we may find FROM GOD important info that can save these in Hell
Q: KNOWING ABOVE RULES, and using game theory and other sciences and mostly prayers and asking God, how can we maximize the number of people, sick angels saved even from future, present and past. Or from other Creations.
Anyone who could solve this problem, would be great in regards with Heavens and after death.