The challenge here is to keep the pick alternating and the notes evenly spaced, whilst maintaining the arch in your fretting hand and reiterating the accent on the 2nd note of every group of 6.
The key is Am.
The Chord Scales:
The triad version would be = Am, Bm b5, C, Dm, Em, F, G
The 3rd chord scale used here (the triad with no 5th) = A b3, B b3, C 3, D b3, E b3, F 3, G 3