Perhaps this is a controversial stance but I think if praying is part of your gambling process you probably shouldn’t be gambling maybe.
It depends on someone's belief. If in his/her belief that praying doesn't deserve to include in gambling, it shouldn't be a part of gambling. While if in his/her belief that praying is something usual in the game like gambling, so just go to pray in gambling. Actually, this something shouldn't be debated because basically the choice of an individual. I don't know why many people debate it here although they know it is the right of the individual.
People would believe into something that he had proven out that it had worked on him or basing up with real life experience and all would really be believing into something if they had done it on the past.
Is there something we can do? No, because its just normal for a human reaction to have this kind of behavior whenever we do make something and it turns out to work then we would surely be having that kind of belief.
Prayer neither could work or not but honestly divine things has nothing to do with gambling.