I know you didn’t ask me, but my input would be if you are being technical: “Christ is king of kings, lord of lords” as described in 1 Timothy 6:15, Revelation 17:14 and 19:16

It comes from the verse saying He is King of kings and Lord of lords. I usually say Christ or Jesis is Lord and that's in reference to Romans 10 which says, "because, if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved."