To start learning Xi - Parousia chords, delve into these chords sequence to get the song's feel: F#m, G#, C#m, F#m, A, F#m, C#m and A. A strategic approach would be to train at 39 BPM initially, and then accelerate to the song's tempo of 79. To match your vocal range and chord inclination, adjust the capo in line with the key: C# Minor.