A uniform threshold is in fact a very bad idea, because different areas legitimately do have a different amount of available evidence. For instance, the threshold in physics is vastly higher than in neurology, even though both are tremendously complicated, because it is much easier to perform the testing in physics, where we can simply set more money to the task (build things such as the LHC, simply to check a few loose ends). If there is limited evidence, we still often have to come to a conclusion, and we need that conclusion to be right.

If talking about certain religious matters, there is virtually no evidence on either side. In fact, it may be that there cannot be a sufficient amount of evidence to determine its, no matter what threshold we set. I believe that this is true, which is why I am strongly agnostic.

In many ways, this is similar to being an atheist, (I definitely do not believe in any specific god or religion), but strong atheism requires even more faith than being religious. An omnipotent being is not a logical contradiction, while being capable of causing any kind of results to your testing, and thus there is absolutely no way to prove the nonexistence of an omnipotent being. It is perhaps possible to disprove that the omnipotent being does certain kinds of things regularly, but then the apologetics have the right to point out why your formulation doesn't apply to their god. At least the religious tend to admit the lack of evidence, and that they go by their faith.