I would say the Holy Ghost bearing witness and then the fruits of the spirit, but I know you don't believe in that type of witness, but prefer archaeological findings or other things that have little to do with faith.I will list the topics that need evidence:
the angel moroni
the golden tablets
the book of mormon
any claim made by smith
that the extra mormon scriptures are divine and true
by evidence I mean real evidence not just what someone's heart tells them for hearts can be deceived