This it the BEST song on Siren Song of The Counter Culture.This is how i play it, and it works awesome for me.
Half Flat Drop D Tuning (Dflat Aflat Dflat Gflat Bflat eflat)

e------------------------------------------------------------------|
b------------------------------------------------------------------|
g------------------------------------------------------------------|
d-2222333344445555222233334444555522223333444455552222333344445555-|
a-2222333344445555222233334444555522223333444455552222333344445555-|
D-2222333344445555222233334444555522223333444455552222333344445555-|

e-------------------------------------------------------------------|
b-------------------------------------------------------------------|
g----9-999-------------9-999------------9-999-----------------------| 
d-2X-9-999-57-777/-2X-9-999-5/7-77~-2X-9-999-57-7-5-2-5-7-8-7-5-2-|  X2
a-2X-7-777-57-777/-2X-7-777-5/7-77~-2X-7-777-57-7-5-2-5-7-8-7-5-2-|
D-2X-------57-777/-2X-------5/7-77~-2X-------57-7-5-2-5-7-8-7-5-2-|                                        

e-----|  e-------------------| e------------------|
b-----|  b-------------------| b------------------|
g-4---|  g-4---4446-666-4---| g-4---77777777-4---|
d-4-2-|  d-4-2-4446-666-4-2-| d-4-2-77777777-4-2-|
a-2-2-|  a-2-2-2224-444-2-2-| a-2-2-55555555-2-2-|
D---2-|  D---2-------------2-| D---2------------2-|

e-----|  e-------------------| e---------------------------------------|
b-----|  b-------------------| b---------------------------------------|
g-4---|  g-4---4446-666-4---| g-4---6666666666666666-8888888888888888-|
d-4-2-|  d-4-2-4446-666-4-2-| d-4-2-6666666666666666-8888888888888888-|
a-2-2-|  a-2-2-2224-444-2-2-| a-2-2-4444444444444444-6666666666666666-|
D---2-|  D---2-------------2-| D---2-----------------------------------|

e-------------------------------------------------------------------|
b-------------------------------------------------------------------|
g----9-999-------------9-999------------9-999-----------------------| 
d-2X-9-999-57-777/-2X-9-999-5/7-77~-2X-9-999-57-7-5-2-5-7-8-7-5-2-|  X2
a-2X-7-777-57-777/-2X-7-777-5/7-77~-2X-7-777-57-7-5-2-5-7-8-7-5-2-|
D-2X-------57-777/-2X-------5/7-77~-2X-------57-7-5-2-5-7-8-7-5-2-|                                        
         
e-----|  e-------------------| e------------------|
b-----|  b-------------------| b------------------|
g-4---|  g-4---4446-666-4---| g-4---77777777-4---|
d-4-2-|  d-4-2-4446-666-4-2-| d-4-2-77777777-4-2-|
a-2-2-|  a-2-2-2224-444-2-2-| a-2-2-55555555-2-2-|
D---2-|  D---2-------------2-| D---2------------2-|

e-----|  e-------------------| e---------------------------------------|
b-----|  b-------------------| b---------------------------------------|
g-4---|  g-4---4446-666-4---| g-4---6666666666666666-8888888888888888-|
d-4-2-|  d-4-2-4446-666-4-2-| d-4-2-6666666666666666-8888888888888888-|
a-2-2-|  a-2-2-2224-444-2-2-| a-2-2-4444444444444444-6666666666666666-|
D---2-|  D---2-------------2-| D---2-----------------------------------|

e----------------------------------------------------------------------------------------------|
b----------------------------------------------------------------------------------------------|
g----9-999-------------9-999------------9-999--------------------------------------------------|
d-2X-9-999-57-777/-2X-9-999-5/7-77~-2X-9-999-57-7-5-2-5-7-8-7-5-2-5-7-8-7-5-2-5-7-8-7-5------|
a-2X-7-777-57-777/-2X-7-777-5/7-77~-2X-7-777-57-7-5-2-5-7-8-7-5-2-5-7-8-7-5-2-5-7-8-7-5------|
D-2X-------57-777/-2X-------5/7-77~-2X-------57-7-5-2-5-7-8-7-5-2-5-7-8-7-5-2-5-7-8-7-5------|           
        
e---------------------|          e-------------|
b---------------------|          b-------------|
g-------4----3----2---|      X3  g-------------|
d-5b-2~-4-22-1-22-2-2-|          d-------------|
a-5b-2~-2-22-1-22-0-2-|          a-2-5-7-8-7-5-|
D-5b-2~---22---22---2-|          D-2-5-7-8-7-5-|

e---------------------|          e-------------|
b---------------------|          b-------------|
g-------4----3----2---|      X3  g-------------|
d-5b-2~-4-22-1-22-2-2-|          d-------------|
a-5b-2~-2-22-1-22-0-2-|          a-2-5-7-8-7-5-|
D-5b-2~---22---22---2-|          D-2-5-7-8-7-5-|         

e---------------------|          e-----------------------------------------------|
b---------------------|          b-----------------------------------------------|
g-------4----3----2---|      X3  g-----------------------------------------------|
d-5b-2~-4-22-1-22-2-2-|          d-2-5-7-8-7-5-2-5-7-8-7-5-2-5-7-8-7-5-2~~~~~~---|
a-5b-2~-2-22-1-22-0-2-|          a-2-5-7-8-7-5-2-5-7-8-7-5-2-5-7-8-7-5-2~~~~~~---|
D-5b-2~---22---22---2-|          D-2-5-7-8-7-5-2-5-7-8-7-5-2-5-7-8-7-5-2~~~~~~---|

pretty hard cuz its so fast, but this song's fun.