Here are a list of Bible promises for you to pray. I am by no means a prosperity Gospel person, and consider myself a very rational person. But when examining the Scriptures, I can't help but conclude that the faith we exercise actually correlates with real life effects. Come to the Lord with full faith, embracing these promises in the way God intends for you to. There are many unexplained happenings in life, and some of them include why we have such bold promises for prayer and don't receive the outcomes we hope for. Nonetheless, we cannot doubt God and must continue to believe his promises in full faith. As noted above, we must always submit to The sovereign will of God. But I do agree with you, that Biblically it seems like healing should be the norm.
And Jesus said to him, “ 'If you can!' All things are possible for one who believes.” Mark 9:23
And Jesus answered them, “Have faith in God. Truly, I say to you, whoever says to this mountain, ‘Be taken up and thrown into the sea,’ and does not doubt in his heart, but believes that what he says will come to pass, it will be done for him. Therefore I tell you, whatever you ask in prayer, believe that you have received it, and it will be yours. And whenever you stand praying, forgive, if you have anything against anyone, so that your Father also who is in heaven may forgive you your trespasses.”
Mark 11:22-25
And Jesus answered them, “Truly, I say to you, if you have faith and do not doubt, you will not only do what has been done to the fig tree, but even if you say to this mountain, ‘Be taken up and thrown into the sea,’ it will happen. And whatever you ask in prayer, you will receive, if you have faith." Matthew 21:21-22
For everyone who asks receives, and the one who seeks finds, and to the one who knocks it will be opened. What father among you, if his son asks for a fish, will instead of a fish give him a serpent; or if he asks for an egg, will give him a scorpion?
If you then, who are evil, know how to give good gifts to your children, how much more will the heavenly Father give the Holy Spirit to those who ask him!
Luke 11:10-13
Truly, truly, I say to you, whoever believes in me will also do the works that I do; and greater works than these will he do, because I am going to the Father. Whatever you ask in my name, this I will do, that the Father may be glorified in the Son. If you ask me anything in my name, I will do it.
John 14:12-14
You did not choose me, but I chose you and appointed you that you should go and bear fruit and that your fruit should abide, so that whatever you ask the Father in my name, he may give it to you.
John 15:16
In that day you will ask nothing of me. Truly, truly, I say to you, whatever you ask of the Father in my name, he will give it to you. Until now you have asked nothing in my name. Ask, and you will receive, that your joy may be full.
John 16:23-24
He said to them, “Because of your little faith. For truly, I say to you, if you have faith like a grain of mustard seed, you will say to this mountain, ‘Move from here to there,’ and it will move, and nothing will be impossible for you.”
Matthew 17:20
Again I say to you, "If two of you agree on earth about anything they ask, it will be done for them by my Father in heaven. For where two or three are gathered in my name, there am I among them.”
Matthew 18:19-20
Is anyone among you sick? Let him call for the elders of the church, and let them pray over him, anointing him with oil in the name of the Lord. And the prayer of faith will save the one who is sick, and the Lord will raise him up. And if he has committed sins, he will be forgiven. Therefore, confess your sins to one another and pray for one another, that you may be healed. The prayer of a righteous person has great power as it is working.
James 5:14-16
If you abide in me, and my words abide in you, ask whatever you wish, and it will be done for you.
John 15:7
“Ask, and it will be given to you; seek, and you will find; knock, and it will be opened to you. For everyone who asks receives, and the one who seeks finds, and to the one who knocks it will be opened. Or which one of you, if his son asks him for bread, will give him a stone? Or if he asks for a fish, will give him a serpent?
If you then, who are evil, know how to give good gifts to your children, how much more will your Father who is in heaven give good things to those who ask him!" Matthew 7:7-11
Let us then with confidence draw near to the throne of grace, that we may receive mercy and find grace to help in time of need.
Hebrews 4:16