We do not need prayers to achieve, accomplish or get over things we can physically avoid.
When we come together with one mind, we can achieve a lot. In Luke 11:17,  Jesus said any kingdom filled with civil war is doomed; so is a home filled with conflict and negative arguments. Definitely there will come times in our lives when we are wronged by those around us. There are so many of us also who are depressed because of broken trust.
One thing is for sure, God and Satan, have at least one thing in common: They all know the power of unity. Unity is strength!

The key is to Let Go!
Leave everything and follow me!  Jesus’ big command to us all. When we believe in the Lord (Mark 16:17) as our saviour and do as he commands, then we shall not only do what Jesus did, but do more; John 14:12.  Jesus summed this up by saying that if we have faith and trust we can do greater things in his name; Matthew 21:21.  We need to learn the art and act of forgiveness. There is NO way that there can be unity if we cannot learn how to forgive.

Trust is very important
We are all dynamic and so strategies have to be different when we deal with one another. We are equally created but differently talented. However, God orders the feet of the righteous Psalms 37:23 so when we allow Him into our hearts, He will give us the strategies to trust.
When trust exists among us then there can be unity. When there is unity, then as Jesus said in Matthew 18:19, when two or three agree it shall be made possible.