I am working on a build for rogue archer scout. It must be F2P, so a 28-point build, no tomes, no premium classes etc.

Primary goal: Good ranged damage dealing
Secondary goal: Good sneaking/scouting ability to spot mobs
Tertiary goal: Good mobility/roofwalking for getting somewhere high and out of range of the mobs where I can snipe down at them whenever possible
Not interested in: Melee or spellcasting, this is a pure archer build except when I HAVE to pull out some blades

Before anyone says it, yes I know that this kind of ranged dps will not compare with the best melee dps characters, but I don't care. I enjoy the role of an archer, so let's just make the best use of the game mechanics possible for my desired role.

I picked Human for the skills and extra early feat, and general balance. I left CON low because I don't intend to get involved in the melee too much, kiting, hiding or roofwalking wherever possible, but I added Toughness just in case. Put everything I can into STR and DEX, trying to keep them roughly even. The rogue levels are for improved skills like Hide, Spot and Move Silently, improving DEX and as a bonus I got Assassin. The fighter levels are for maximising my longbow damage, improving STR, and all the extra feats I needed to make it a decent archer. The splash ranger is for the archery type feats and TWF which could come in handy if they manage to reach me.

Anyways, have I made any glaring errors with this build? Will it fit the bill?

Constructive criticism is welcome, but please include facts and explanation not just an opinion. Thank you.

Code:
Character Plan by DDO Character Planner Version 03.14.02
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Moggeth Hawk
Level 20 True Neutral Human Male
(12 Fighter \ 6 Rogue \ 2 Ranger) 
Hit Points: 254
Spell Points: 0 
BAB: 18\18\23\28\28
Fortitude: 13
Reflex: 18
Will: 5

                  Starting          Feat/Enhancement
Abilities        Base Stats          Modified Stats
(28 Point)       (Level 1)             (Level 20)
Strength             16                    23
Dexterity            18                    23
Constitution         10                    10
Intelligence          8                     8
Wisdom                8                     8
Charisma              8                     8

                  Starting          Feat/Enhancement
                 Base Skills         Modified Skills
Skills           (Level 1)            (Level 20)
Balance               8                    11
Bluff                -1                     3
Concentration         0                     2
Diplomacy            -1                     1
Disable Device       n/a                   n/a
Haggle               -1                    -1
Heal                 -1                    -1
Hide                  8                    33
Intimidate           -1                     1
Jump                  7                    20
Listen               -1                    -1
Move Silently         8                    31
Open Lock             n/a                   n/a
Perform              n/a                   n/a
Repair               -1                    -1
Search                3                     4
Spot                  3                    27
Swim                  7                    10
Tumble                8                    11
Use Magic Device     n/a                   n/a

Level 1 (Rogue)
Feat: (Selected) Point Blank Shot
Feat: (Human Bonus) Toughness
Enhancement: Rogue Damage Boost I
Enhancement: Rogue Sneak Attack Training I
Enhancement: Improved Hide I
Enhancement: Improved Move Silently I


Level 2 (Fighter)
Feat: (Fighter Bonus) Dodge
Enhancement: Fighter Attack Boost I
Enhancement: Fighter Critical Accuracy I
Enhancement: Rogue Faster Sneaking I
Enhancement: Fighter Toughness I


Level 3 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Undead
Feat: (Selected) Weapon Focus: Ranged Weapons
Enhancement: Fighter Armored Agility I
Enhancement: Improved Search I
Enhancement: Improved Spot I
Enhancement: Rogue Improved Trap Sense I


Level 4 (Fighter)
Ability Raise: STR
Feat: (Fighter Bonus) Mobility
Enhancement: Improved Balance I
Enhancement: Improved Tumble I
Enhancement: Fighter Strength I


Level 5 (Ranger)
Enhancement: Human Adaptability Dexterity I


Level 6 (Fighter)
Feat: (Selected) Shot on the Run
Enhancement: Fighter Armor Mastery I
Enhancement: Fighter Flanking Mastery I


Level 7 (Fighter)
Feat: (Fighter Bonus) Manyshot
Enhancement: Fighter Attack Boost II
Enhancement: Fighter Critical Accuracy II
Enhancement: Fighter Toughness II


Level 8 (Rogue)
Ability Raise: STR
Enhancement: Rogue Sneak Attack Accuracy I
Enhancement: Rogue Dexterity I


Level 9 (Fighter)
Feat: (Selected) Weapon Specialization: Ranged Weapons


Level 10 (Fighter)
Feat: (Fighter Bonus) Precise Shot
Enhancement: Kensei Longbow Mastery I
Enhancement: Fighter Kensei I
Enhancement: Fighter Strength II


Level 11 (Rogue)


Level 12 (Fighter)
Ability Raise: DEX
Feat: (Selected) Improved Precise Shot
Enhancement: Fighter Toughness III


Level 13 (Rogue)
Enhancement: Rogue Damage Boost II
Enhancement: Rogue Subtle Backstabbing I
Enhancement: Rogue Sneak Attack Training II
Enhancement: Improved Hide II
Enhancement: Improved Move Silently II


Level 14 (Fighter)
Feat: (Fighter Bonus) Improved Critical: Ranged Weapons
Enhancement: Fighter Longbow Specialization I


Level 15 (Fighter)
Feat: (Selected) Power Critical


Level 16 (Rogue)
Ability Raise: STR
Enhancement: Rogue Faster Sneaking II


Level 17 (Fighter)
Feat: (Fighter Bonus) Improved Two Weapon Fighting
Enhancement: Human Greater Adaptability Strength I
Enhancement: Fighter Strength III
Enhancement: Fighter Toughness IV


Level 18 (Fighter)
Feat: (Selected) Oversized Two Weapon Fighting


Level 19 (Rogue)
Enhancement: Rogue Assassin I
Enhancement: Rogue Sneak Attack Accuracy II


Level 20 (Fighter)
Ability Raise: DEX
Feat: (Fighter Bonus) Greater Weapon Specialization: Ranged Weapons
Enhancement: Kensei Longbow Mastery II
Enhancement: Fighter Kensei II
Enhancement: Rogue Dexterity II