Ok let's take this one chorus at a time for my sake! Let me prefice this by saying Andrew plays a six string tuned a whole step down on all six strings.
So, depending on if you play a six, some of the harmonics and chords may be a little tricky to finger:}
Let's take it from the key change into Ab
high Eb,mid Eb big slide into the next 4 notes that will be thumped
(CC,BbBb,Ab,Db...)
F,EbEb,GG,Bb,C,Eb,Bb,Ab,GG,Ab,Bb,C
CDbC,Bb,Ab,Eb,Db..Bb,Eb...
The next for notes are chords.
the bass note with a tenth added or octave 3rd
(Eb with a G) (D with a Gb) (Db with a F) (C with a E) I hope this is clear.
G hammer on to AbAb,G,Eb,C,Eb,Bb,C,Ab,F
Bb, Harmonic over the Eb and Bb simultaneously, Low Bb, Bb,Eb,Db,C,F,Bb,Eb This is a start see if it works for you before we go on:)