You're overcomplicating it chap. The intro is: Abm7, Abm6, Abm#5, Abm (in other words, its just an Abm with a leading note dropping from Gb, F, E, Eb, D. Easy to play as a barre on the 5th fret with the leading note on the B string.
The second section is: C#m, F#, B, EbAug, Abmin etc.
The second section is: C#m, F#, B, EbAug, Abmin etc.
B, EbAug, Abm, C#m, F# (don't forget that last one!),
B, EbAug, Emaj7, Eb7, Abm
Suggested voicings:
EbAug: x6544x
Emaj7: x7644x
Eb7: x6564x (but don't lean on the top note, its too much)
Hope this is helpful