Riff 1

Eb--------0-------------------------|
Bb----------1-----------------0-----|
Gb-----2------2--------2-----2------|
Db---2----------2----2-----2--------|
Ab-0--------------------------------|
Eb----------------1-----0-----------|

Riff 2

Eb-------------------------------------------------|
Bb-------------------------------------------------|
Gb-------------------------------------------------|
Db-9-9-9-9------9-9-9-9------9-9-9-9---------------|
Ab-7-7-7-7--10--7-7-7-7--10--7-7-7-7--10--10-10-10-|
Eb----------------------------------------8--8--8--|

Riff 3

Eb-----------------------------------|
Bb-----------------------------------|
Gb-----------------------------------|
Db-9-9-9-9---------------------------|
Ab-7-7-7-7-8-8-8-7-7-7-7-2-2-3-2-2-3-|
Eb---------6-6-6-5-5-5-5-0-0-1-0-0-1-|
                         . .   . .

The 10 in riff 2 is a pinch harmonic. The dots underneath the e5 powerchord are palm 
As for the tuning, there is a good possibility it might be wrong.