What part of “in Christ”don’t you get?
Those who die “in Christ” remain in Him. We see them around the Throne praising Him. If it is sorcery to ask them, in Christ, to join in prayer for our needs and concerns, then it was sorcery for the seer of the Book of Revelation to talk to them.
Your prooftexting from the sorcery prohibition of 1 Samuel is laughable exegesis.
If it's "laughable" then I guess you'll be able to show me dozens of scriptures instructing Christians to pray with, or to dead people and many more examples of saints praying in that manner. I'm not talking about someone who is miraculously lifted into heaven and given a special revelation of things to come, I'm talking about doctrinal instruction or examples of engaging in normal prayer with the departed.