As others said above, "luring" is non-consentual and therefore un-Satanic. What you probably mean is "introduce" or "attract" a christian into Satanism.
You should never be too direct with a christian, as they are too ignorant to comprehend plain truth. It can even be dangerous, as sudden bursts of truth can make their world cripple in front of them and leave serious psychological scars and doubts, which is not our goal. Be more diplomatic and patient, build trust with the intended person and make sure they value your opinion. This can be done best with people who already recognise your value in any way. Use actual and logical points, not only for Satanism, but also against christianity and abrahamism in general. Finally, I suggest you do not mention the word "Satan" early on, but rather be slow in your revealing of the Truth.