This is the AA build I came up with after long trial and error (Celfydd).
Race: Elf
Starting abilities: STR 12 DEX 20 CON 10 WIS 8 INT 10 CHA 12
Class: Bard/Barbarian/Arcane Archer
All ability boosts to DEX
Bd Ba AA Dx AB Feat
01 01 20 - Luck of Heroes Perform3 UMD4 Tumble4
02 01 01
03 02 WF Longbow
04 03 21
05 04
06 05 PB Shot
07 06
08 01 22
09 02 Imp Crit Longbow
10 03
11 04
12 05 23 Rapid Shot
13 06
14 07
15 08 Weapon Finesse
16 09 24
17 10
18 07 Blind Fight
19 08
20 09 25 19
21 11 26 Gt Dex1
22 12
23 13
24 14 28 Gt Dex2 Epic WF Longbow
25 15
26 16
27 17 29 Gt Dex3
28 18 31 Gt Dex4
29 19
30 20 32 Gt Dex5
31 21
32 22 34 Gt Dex6
33 23 35 Gt Dex7
34 24
35 25
36 26 38 Gt Dex8 Gt Dex9
37 27
38 28
39 29 39 Gt Dex10
40 02 40 29 Perform6 UMD43 Tumble40 Spellcraft40 Discipline43
Final AB with Ancient Longbow of Divine Power and all magical boosts to DEX: +79/+74/+69/+64
Can buff AB with bard song +1, bless +1 to AB 81 (other buffs possible?)
Final AC with Torey Loremaster's Dress: 87