Once I hit 64, I aim to get Fading Memories level 63 required 6 pts, then finishing up the 16 pts I have left to do in the Archetype level aa's, followed by,
Level 59 Class Abilities ( 71 pts )
Ambidexterity 9 pts,
Instrument Mastery 3,6,9,
Extended Notes 3,6,9,
Singing Mastery 3,6,9,
Physical Enhancement 5,
Scribble Notes 3 ( reduce song mem time by 50 % )
PoP AA's Level 61
Planar Power POP General - 2 pts per level, 10 levels increase stat limits by 5 per rank. Only ones worth investing here I think
POP Class
Lighning Reflexes ( Level 61 ) 3 pts per rank 5 ranks ( increased avoidance )
Innate Defense ( Level 61 ) 3 pts per rank 5 ranks ( increased mitigation )
Harmonious Attack ( Level 61 ) 2 pts per rank 5 ranks ( increased double attack )
Coup De Grace ( Level 62 ) 2 pts per rank 3 ranks ( adds to npc level limit of finishing blows )
Fury of the Ages ( Level 62 ) 2 pts per rank 3 ranks ( addition melee critical hits )
Fleet of Foot ( Level 62 and 64 ) self only run speed increase
Sionachie's Cresendo - ( Level 63 ) 2 pts per rank 3 ranks ( etended notes increase )
Ayonae's Tuetalage level 63 2 pts per rank 3 ranks - increases instrument mod cap
Boastfull Bellow level 63 6 pts AA bsed DD 250 range pulling aid
Fading Memories 6 pts 1 rank level 63
The above is plenty to keep me occupied for a few months so I haven't looked deeper into the aa's.
Hopefully with some level references included above, this will help you plan your path somewhat.
IMHO - focusing on avoidance / durability and aa's that increase song effectiveness, then looking to dps increase makes sense as I primarily solo / duo.