Spiritually higher than Jesus?? I don't even think that's possible.
Truth comes in doses. If absolutely all the secrets were revealed to mankind - imagine the problems it would cause. No, have faith that God will reveal it all in time. And I'm talking about Judgement Day.
God has chosen to give my friend that power. He uses it in his treatments. He got the powers because he wanted to help people.
Be that as it may, something as vital as reincarnation can not possibly be considered to be too much for Man to handle. It's like a root part of a religion; it's not like tomato/tomatoe.
About your friend, you've already made it clear that he apparently speaks to God. My point though is that whenever someone has claimed to have spoken to God; they provide some sort of proof. What proof does your friend have that he really does?
btw, is this a personal friend of yours? Or someone you've met over the net?