I prefer "Wakan Tanka" (Great Mystery) instead of Father God. God has no gender. You also could say "Father Sky, Mother Earth" as well.

You are quite correct! I could have used Wakan Tanka or Tunkashila but on this occasion I chose Father God because most people can easily understand what it means.

How do you expect the god that you are praying to help anyone when it has no history at all of helping anyone in the past? Where are your people with thier lands today? When the blood of thousands of warriors covered the ground from the east to the west the god you are praying to was silent and unmovable. (Not to mention the "holy people" also)