My purpose is to explain the gospel to other people, explain that I have a personal relationship with God (thus God is real), try to explain that God is Holy, Righteous, Glorious, etc.
My secondary purpose is to help people with the needs of their body and soul.
It doesn't matter to me if someone wants to be clever, cute, sarcastic, or whatever. It doesn't matter what someone thinks about me. What matters is that they have a personal relationship with God. It is a matter of eternal life or eternal death.
God will handle matters of irony.