Thank you for your answers and advices!

Yes, i think i'm going with scimitars but an argument can be maybe for Bastard swords. If choosing bastard swords, scimitar dance would be the feat that changes to bastard sword profiency. 1d8 & High Crit & Scimitar Dance feat vs 1d10 + profiency feat. (Hope i didn't forget something here)
I made some changes to the build, few feats and powers. I also looked again at the epic destinys and decided to change it to one of the three of these : Demigod, Destined Scion or Indomitable Champion. I'm just not quite sure which one would be the best for this build. I'm leaning over to either Demigod or Destined Scion.
Demigod would offer me half my HP recovery once per day, regeneration once per day per encounter and a way to recover an encounter power when i have echausted them all.
Destined Scion would offer me +1 to attack & +2 to saves, twice my healing surge value heal when 0 or fewer HP as daily power and a daily power that allows me to hit if i miss.
Indomitable Champion offers 20 HP & +1 to saves, drop to 0 or fewer HP -> regain HP for your healing surge value & +5 to all defences until end of next turn.
All offer +2 to 2 stats (STR & DEX in this case).
I have bolded the unsure feats & powers.
Version 2Race : Elf
Class : Ranger
Paragon path : Stormwarden
Epic Destiny : Indomitable Champion / Demigod / Destined Scion
Background : Cormyr (Wheloon)
Starting Stats :
16 STR, 13 CON, 14 (+2 Elf) DEX, 8 INT, 14 (+2 Elf) WIS, 10 CHA
Final Stats :
26 STR, 15 CON, 26 DEX, 10 INT, 18 WIS, 12 CHA
Initiative : 30
Movement : 7
AC : 49 Fort : 38 Ref : 39 Will : 33 (Elderhide +6, +3 Elven Chain Shirt (Wondorous Item))
HP : 187 Surges per Day : 8
Skills :
Trained : Athletics 28, Dungeoneering 24, Nature 26, Perception 26, Stealth 28
Others : Acrobatics 23, Heal 19, Endurance 17, Insight 19, Thievery 25
Feats :
Race : Wild Step, Group Awareness
Class : Toughness, Hunter's Quarry, Running Attack
1. Quick Draw
2. Heavy Blade Expertise
4. Two-Weapon Fighting
6. Two-Weapon Defence
8. Weapon Focus: Heavy Blades
10. Wintertouched
----
11. Armor Specialization: Hide
12. Lasting Frost
14. Scimitar Dance
16. Devastating Critical
18. Two-Weapon Opening
20. Lethal Hunter
----
21. Heavy Blade Mastery
22. Improved Defenses
24. Evasion / Epic Resurgency
26. Martial Mastery
28. Rending Tempest
30. Slashing Storm
Powers : (W= At-Will, E= Encounter, D= Daily, U= Utility)
Race : Elven Accuracy (E)
1. Twin-Strike (W), Marauder’s Rush (W), Off-Hand Strike (E), Jaws of the Wolf (D)
2. Invigorating Stride (U)
3. Ruffling Sting / Disruptive Strike (E)
5. Frenzied Skirmish (D)
6. Weave Through the Fray (U)
7. Claws of the Griffon (E)
9. Attacks on the Run (D)
10. Root Gate / Begin the Hunt / Resume The Hunt (U)
----
11. Blade Storm (Stormwarden), Stormstep Action (Stormwarden), Clearing the Ground (Stormwarden E)
12. Throw Caution to the Wind (Stormwarden U/Stance)
13. Replace Off-Hand Strike (E) -> Off-Hand Diversion (E)
15. Replace Jaws of the Wolf (D) -> Blade Cascade (D)
16. Ranger’s Parry / Begin the Hunt / Resume the Hunt (U), Twin-Blade Storm (Stormwarden)
17. Replace Disruptive Strike (E) -> Untamed Outburst (E)
19. Replace Frenzied Skirmish (D) -> Cruel Cage of Steel (D)
20. Cold Steel Hurricane (Stormwarden D)
----
21. Epic Heroism / Divine Spark, +2 to STR & DEX (Indomitable Champion / Destined Scion / Demigod)
22. Adamant Recovery (U)
23. Replace Claws of the Griffon (E) -> Nonchalant Collapse (E)
24. Epic Resilience : +20 HP & +1 to saves (Indomitable Champion) / Divine Recovery (Demigod) / Epic Combantant: +1 to hit & 2 to to saves (Destined Scion)
25. ----
26. Epic Tenacity (Indomitable Champion) / Divine Regeneration (Demigod) / Epic Recovery (Destined Scion)
27. Replace Off-Hand Diversion (E) -> Death Rend (E)
28. ----
29. Replace Attacks on the Run (D) -> Weave a Web of Steel / Ultimate Confrontation (D)
30. Unmatched Defense (Indomitable Champion) / Divine Miracle (Demigod) / Undeniable Victory (Destined Scion)
I also made a list for the equipment, not sure if these are the ones to get as i haven't studied much of the equipment books.
Armor : +6 Elderhide
Weapons : +6 Frost Scimitars, +6 Longbow
Bracers : Iron Armbands of Power
Feet : Boots of Teleportation
Hands : Gloves of Ice
Head : Eye of Awareness
Neck : Torc of Power Preservation
Ring : Ring of Free Time
Ring : Shadow Band
Waist : Belt of Titan Strenght
Wondorous Item : Elven Chain Shirt