Haseo
20 Chaotic Good Half-Elf Male
(18 rogue/ 2 Wizard)
Hit points 198 (possibly 208)
Spell Points 313

BAB:14/14/19/24
Fortitude:8
Reflex:17
Will:10

Take two levels of wizard at 7 and 8, rest rogue.

Atributes (level 1) (level 20)

Str 14 16

Dex 15 22

Con 14 14

Int 14 16

Wis 12 12

Cha 10 10

SKills (Level 1) (level 20)
Blance 6 21
Bluff 0 6
Concentration 2 2
Diplomacy 0 0
Diable Device 6 26
Haggle 2 17
Heal 1 1
Hide 6 35
Intimidate 0 0
Jump 6 15
Listen 3 18
Move Silently 6 37
Openlock 6 29
Perform n/a n/a
Repair 2 3
Search 6 26
Spot 5 24
Swim 2 3
Tumble 6 23
Use Magic Device n/a n/a

Feats:
level 1 Point Blank Shot/Half-Elf Dilettante: Ranger
level 3 Precision Shot
level 6 Weapon Focus: Ranged Weapons
level 7 (Bonus feat wizard) Mental Toughnes
level 9 Rapid Shot
level 12 Improved Critical: Ranged Weapons/ Defensive Roll
level 15 Toughness/ Crippling Strike
level 18 Many Shot/ Improved Evasion

Spells
Detect Secret Doors
Expeditious Rrtreat
Feather Fall
Jump
Master's Touch
Merfolk's Blessing
Tumble

Enancements
The plan is to get to level 9 and redo your enhancements, thats when AA becomes available in this build (Requireing a BAB that you don't get until then.)
Enhancemnets taken from level 9 to 20:
level 9
Damage Boost I & II
Haste Boost I
SKill Boost I
Improved Ranger Dilettante I
Human Adaptability Strength I
Subtle Backstabbing I
Rogue Assassin I
Sneak attack Accuracy I & II
Sneak attack Training I & II & III
Improved Hide I & II
Improved Move Silently I & II
Rogue Dex I
Wizard Int I
Elven Arcane Archer: Imbue Force Arrow
Elven Arcane Archer I

Level 10
Haste boost II & III

Level 11
Arcane ARcher: Imbue Acid Arrows
Arcane Archer: Conjure +2 Arrows

Level 12
Improved Ranger Dilettante II
Sneak Attack accuracy II

Level 14
Arcane Archer: Imbue Explosive Arrows
Arcane Archer: Conjure +3 Arrows
Rogue Assassin II
Rogue Dexterity II

Level 15
Human Greater Adaptability Dex

Level 16
Sneak Attack Training IV

Level 17
Arcane Archer: Imbue Terrow Arrows
Arcane Archer: Conjure +4 Arrows

Level 18
Sneak Attack Accuracy IV

level 19
Rogue Dexterity III

Level 20
Arcane Archer: Imbue Slaying Arrows
Arcane Archer: Conjure +5 Arrows
Rogue Assassin III

This leaves you with 1 extra point, Could get explosive force arrow or Racial toughnes for 10 more hp. Another choice could be to not take conjure +5 arrows or imbue slaying arrrows and get Improve Dilletante III to get 8 points of str (not 8 str but +8 bonus from str) to your bow dmg, instead of 6.

All stats are based off just enhancements/levels gained. No equipment or tomes.
Conludeing Sneak attack damage is 11d6+12+600 vorpal (with imbue slaying/assassin III)

Thoughts and suggestions?