Did you take Dev Crit into account? Here's the RDD AA build I was talking about. After you finish HotU, don't discard your character. Take her into the Sands of Fate series, and you'll get the rest of the way to level 40. You might already know this trick, but you can copy-and-paste your build into the notes tab in your in-game journal to have it on hand as you play.
Draconic Archer (Bard 7 / Red Dragon Disciple 10 / Arcane Archer 23)
Elf, Any Non-Lawful
Playable 1 - 40, PvM
Abilities:
STR: 16 (26)
DEX: 17 (30)
CON: 10 (12)
WIS: 8
INT: 12 (14)
CHA: 12 (14)
Leveling Guide:
Elf: (Hardiness vs. Enchantments, Keen Sense, Low-light Vision, Skill Affinity: Listen, Skill Affinity: Search, Skill Affinity: Spot, Sleeplessness)
01: Bard(1): Point Blank Shot
02: Bard(2)
03: Bard(3): Weapon Focus: Longbow
04: Bard(4): DEX+1, (DEX=18)
05: Bard(5)
06: Red Dragon Disciple(1): Blind Fight
07: Red Dragon Disciple(2): (STR=18)
08: Red Dragon Disciple(3): STR+1, (STR=19)
09: Red Dragon Disciple(4): Power Attack, (STR=21)
10: Arcane Archer(1)
11: Arcane Archer(2)
12: Arcane Archer(3): STR+1, Cleave, (STR=22)
13: Arcane Archer(4)
14: Arcane Archer(5)
15: Red Dragon Disciple(5): Improved Critical: Longbow
16: Red Dragon Disciple(6): DEX+1, (DEX=19)
17: Red Dragon Disciple(7): (CON=12)
18: Red Dragon Disciple(
: Great Cleave
19: Arcane Archer(6)
20: Arcane Archer(7): DEX+1, (DEX=20)
21: Red Dragon Disciple(9): Epic Weapon Focus: Longbow, (INT=14)
22: Red Dragon Disciple(10): {Darkvision}, (STR=26), (CHA=14)
23: Arcane Archer(
24: Arcane Archer(9): DEX+1, Overwhelming Critical: Longbow, (DEX=21)
25: Arcane Archer(10)
26: Arcane Archer(11)
27: Bard(6): Devastating Critical: Longbow
28: Arcane Archer(12): DEX+1, (DEX=22)
29: Arcane Archer(13)
30: Arcane Archer(14): Great Dexterity I, Great Dexterity II, (DEX=24)
31: Arcane Archer(15)
32: Arcane Archer(16): DEX+1, (DEX=25)
33: Arcane Archer(17): Great Dexterity III, (DEX=26)
34: Arcane Archer(18): Epic Prowess
35: Arcane Archer(19)
36: Arcane Archer(20): DEX+1, Great Dexterity IV, (DEX=28)
37: Bard(7)
38: Arcane Archer(21)
39: Arcane Archer(22): Armor Skin, Great Dexterity V, (DEX=29)
40: Arcane Archer(23): DEX+1, (DEX=30)
Stats:
Hitpoints: 350
Skillpoints: 214
Saving Throws (Fortitude/Will/Reflex): 23/21/31
Saving Throw bonuses: Spells: +8, Mind Effects: +2
BAB: 26
AB (max, naked): 35 (melee), 52 (ranged)
AC (naked/mundane armor/shield only): 34/37
Spell Casting: Bard(3)
Alignment Changes: 0
Skills:
Discipline 40(48), Listen 43(44), Lore 20(29), Perform 10(12), Spellcraft 38(40), Tumble 40(50), UMD 23(25)
01: Discipline(4), Lore(2), Perform(2), Spellcraft(4), Tumble(4), UMD(4)
02: Lore(1), Perform(3), Tumble(1)
03: Lore(3), Perform(1), UMD(1)
04: Lore(1), Perform(1), Spellcraft(1), UMD(2)
05: Lore(1), Perform(1), Spellcraft(2), UMD(1)
06: Discipline(1), Spellcraft(2)
07: Discipline(3)
08: Discipline(3)
09: Discipline(1), Spellcraft(2)
10: Lore(5)
11: Lore(1), Save(4)
12: Lore(1), Save(
13: Save(13)
14: Save(18)
15: Discipline(6), Spellcraft(7), Save(
16: Discipline(1), Spellcraft(1), Save(9)
17: Discipline(1), Spellcraft(1), Save(10)
18: Discipline(1), Spellcraft(1), Save(11)
19: Save(16)
20: Save(21)
21: Discipline(3), Spellcraft(2), Save(19)
22: Discipline(1), Spellcraft(1), Save(21)
23: Save(27)
24: Save(33)
25: Save(39)
26: Save(45)
27: Discipline(5), Perform(2), Spellcraft(4), Tumble(25), UMD(15)
28: Listen(6)
29: Listen(6)
30: Listen(6)
31: Listen(6)
32: Listen(6)
33: Save(6)
34: Save(12)
35: Save(18)
36: Save(24)
37: Discipline(10), Spellcraft(10), Tumble(10)
38: Listen(6)
39: Listen(6)
40: Listen(1), Lore(5)