Stump the Christian?

[FatAndFaithless]

No.  They can't be investigated let alone refuted.  You don't get to concoct unfalsifiable premises and then treat that as 'reasonable'.

Because you can't test them does not mean they are unfalsifiable.

Uh, yes, yes it does. If you have no way of investigating a claim, you cannot falsify it.

A statement is  if it is possible to conceive an observation or an argument which proves the statement in question to be false.

Falsifiability requires some observation or experiment. You cannot make observations or perform experiments on something that is untestable. How exactly could we falsify your claims?

You know they are not baseless

Sorry, miracle claims and metaphysical god-man-savior claims are entirely baseless.

Again, you might not like the quality of the evidence

Evidence needs to exist before it can be good or poor. You have nothing but your flat assertions.

following the evidence we have is quite 'reasonable'.

And no evidence points towards any of the things you listed. You don't have a theory, hell it's barely a guess. In any realm of investigation your claims are anything but reasonable.