Destil
Explorer
Since we're talking about the multiclass Barbarian, let's look at a comparable (mostly) PHB build two-weapon ranger. There's not a huge amount of min-maxing going on here, and I limited myself to PHB1 stuff for the most part (aside from being a half-orc). You could also go dual scimitars with scimitar dance and a higher Dex to really bring home the auto-damage or focus a bit more on crits with your magic items.
Twin Strike (+19) for 2d10+18+2d8 when both hit (38 average vs. your guy's 40.5). On top of that:
Double the crit rate, and those crits are pretty nasty.
Less prone to overkill a target.
Better chance of getting the quarry damage.
Automatically deal 4 damage to an adjacent enemy at the end of his turn.
Remember, your guy passed up his paragon path to pick up that at-will. A lot of the time that's a bad move, but barbarian makes it work. All in all if it's overpowered it's balanced by paragon multiclassing being underpowered, and neither are extreme enough to be game breakers.
====== Created Using Wizards of the Coast D&DI Character Builder ======
Tawar, level 13
Half-Orc, Ranger, Stormwarden
Build: Two-Blade Ranger
Fighting Style: Two-Blade Fighting Style
FINAL ABILITY SCORES
Str 23, Con 11, Dex 19, Int 11, Wis 12, Cha 9.
STARTING ABILITY SCORES
Str 18, Con 10, Dex 14, Int 10, Wis 11, Cha 8.
AC: 27 Fort: 26 Reflex: 25 Will: 20
HP: 93 Surges: 6 Surge Value: 23
TRAINED SKILLS
Dungeoneering +12, Nature +12, Athletics +16, Perception +12, Acrobatics +14
UNTRAINED SKILLS
Arcana +6, Bluff +5, Diplomacy +5, Endurance +7, Heal +7, History +6, Insight +7, Intimidate +7, Religion +6, Stealth +9, Streetwise +5, Thievery +9
FEATS
Level 1: Weapon Proficiency (Bastard sword)
Level 2: Weapon Focus (Heavy Blade)
Level 4: Agile Hunter
Level 6: Lethal Hunter
Level 8: Two-Weapon Fighting
Level 10: Two-Weapon Defense
Level 11: Devastating Critical
Level 12: Heavy Blade Opportunity
POWERS
Ranger at-will 1: Hit and Run
Ranger at-will 1: Twin Strike
Ranger daily 1: Jaws of the Wolf
Ranger daily 5: Two-Wolf Pounce
Ranger daily 9: Swirling Leaves of Steel
Ranger encounter 1: Dire Wolverine Strike
Ranger encounter 13: Armor Splinter (replaces Dire Wolverine Strike)
Ranger encounter 3: Disruptive Strike
Ranger encounter 7: Sweeping Whirlwind
Ranger utility 10: Expeditious Stride
Ranger utility 2: Yield Ground
Ranger utility 6: Evade Ambush
ITEMS
Adventurer's Kit, Terror Bastard sword +3, Thundering Bastard sword +3, Sunleaf Hide Armor +3, Amulet of Protection +3, Frost Longbow +2
====== Created Using Wizards of the Coast D&DI Character Builder ======
Twin Strike (+19) for 2d10+18+2d8 when both hit (38 average vs. your guy's 40.5). On top of that:
Double the crit rate, and those crits are pretty nasty.
Less prone to overkill a target.
Better chance of getting the quarry damage.
Automatically deal 4 damage to an adjacent enemy at the end of his turn.
Remember, your guy passed up his paragon path to pick up that at-will. A lot of the time that's a bad move, but barbarian makes it work. All in all if it's overpowered it's balanced by paragon multiclassing being underpowered, and neither are extreme enough to be game breakers.
====== Created Using Wizards of the Coast D&DI Character Builder ======
Tawar, level 13
Half-Orc, Ranger, Stormwarden
Build: Two-Blade Ranger
Fighting Style: Two-Blade Fighting Style
FINAL ABILITY SCORES
Str 23, Con 11, Dex 19, Int 11, Wis 12, Cha 9.
STARTING ABILITY SCORES
Str 18, Con 10, Dex 14, Int 10, Wis 11, Cha 8.
AC: 27 Fort: 26 Reflex: 25 Will: 20
HP: 93 Surges: 6 Surge Value: 23
TRAINED SKILLS
Dungeoneering +12, Nature +12, Athletics +16, Perception +12, Acrobatics +14
UNTRAINED SKILLS
Arcana +6, Bluff +5, Diplomacy +5, Endurance +7, Heal +7, History +6, Insight +7, Intimidate +7, Religion +6, Stealth +9, Streetwise +5, Thievery +9
FEATS
Level 1: Weapon Proficiency (Bastard sword)
Level 2: Weapon Focus (Heavy Blade)
Level 4: Agile Hunter
Level 6: Lethal Hunter
Level 8: Two-Weapon Fighting
Level 10: Two-Weapon Defense
Level 11: Devastating Critical
Level 12: Heavy Blade Opportunity
POWERS
Ranger at-will 1: Hit and Run
Ranger at-will 1: Twin Strike
Ranger daily 1: Jaws of the Wolf
Ranger daily 5: Two-Wolf Pounce
Ranger daily 9: Swirling Leaves of Steel
Ranger encounter 1: Dire Wolverine Strike
Ranger encounter 13: Armor Splinter (replaces Dire Wolverine Strike)
Ranger encounter 3: Disruptive Strike
Ranger encounter 7: Sweeping Whirlwind
Ranger utility 10: Expeditious Stride
Ranger utility 2: Yield Ground
Ranger utility 6: Evade Ambush
ITEMS
Adventurer's Kit, Terror Bastard sword +3, Thundering Bastard sword +3, Sunleaf Hide Armor +3, Amulet of Protection +3, Frost Longbow +2
====== Created Using Wizards of the Coast D&DI Character Builder ======