ThatOrthodoxGuy, Indeed He is risen!
These are troubling practices to hear that your friend is going through. It is all too easy for someone to claim one thing and do another. One reason we confess our sins is to become more aware of what we are really doing beyond the lies we tell ourselves and experience. (The "world," between the media, how busy everything is, etc. all can feed into these lies. The sins we commit are known and unknown, but the world can create these lies we tell ourselves.) Shanghaiski has good commentary on this, and is correct that such matters, however "small" or trivial, open us up to evil.
Your friend may think these trinkets are giving him "luck." How is he defining luck? Is he getting more money? It's easy enough to bring something into our lives and believe it has improved it in someway. Think of infomercials and all the promises those products give. The very act of buying one of those things and having it in your possession is enough to feel as if that area of our lives, that the product is targeted at, has improved. I can wear a magnet bracelet all day, but my golf game hasn't gotten any better. So, has he truly seen a definable profit from having these things, minus the cost of acquiring them all, the incense burned for them, etc.? Maybe positing it to him about the validity of his claims will prove their nonsense.
However, the devil still operates in the world, and real effects can happen from it. Love for money can lead to ruin; the devil will see to that. I'm reminded upon reading about your situation of the Sts. Cyprian and Justina. Know that if real results are happening, it's from the true presence of demons that will lead to further damnation. (And you felt this presence at his house.) It cannot be God operating "through" those trinkets, much less for something as the increase of wealth that will put the worship (and yes, he is worshiping) of said trinkets before God.
If your friend really believes he doesn't worship these false gods, then why is he not going to church or responding to the priest? The evil forces do not want him to go because they know it will close the door on them. Yet, currently, he's closing the door on himself to God's presence in his life. All good and true things are gifts from God, and those gifts will make us want to be closer to Him, not separate ourselves through such devices that your friend is using. Is he aware of his separation from church and these reasons why it proves the evil the statues are opening up to him?
He must pray and repent. As his friend, pray for him, and have others pray for him as well. Tell him you're putting him on the prayer list at church and do so. I can't offer any real advice, but he has to return to God, the church, and prayer. I can offer my prayers though, and I pray for your comfort at this time. I also pray for your friend's return to God.