Avenged Sevenfold - A Little Piece Of Heaven Live Chords & Tabs

this is the riff that syn played (which is tremendously beautiful) during the great live 
on lbc for the song 'a little piece of heaven'.

i just want to share this just so we could discuss and improvise for the closest tab 
that we could think of on the riff that we are looking for.
[ Tab from: https://www.guitartabs.cc/tabs/a/avenged_sevenfold/a_little_piece_of_heaven_live_tab.html ]
e|------------------------------------------------------------------------|
B|------------------------------------------------------------------------|
G|--------9-------9---------3------3-------5--------7-------5-------7-----|
D|-----7-------7---------3-------3------5--------5-------5-------5--------|
A|--5-------5---------1-------1-------5-------5-------5-------5-----------|
D|------------------------------------------------------------------------|

so far this is all that i am able to figure out. hope you guys have a better idea of 
what scales that he intend to use so at least we would know the right notes that he could 
be using.

i cant figure out how the last set of the riffs (before going back to the start) goes 
but the last note (on the G string) sound more like 7, 9, 10, 9 then back to start.

help, in need. do give honest critics, thank you.