In order to fit in all of the feats I don't think TWF is possible, so instead I went with Falchions because elves get +2 damage and to hit using them.
Fighter: Kensai II, Power Surge, Haste Boosts, Improved Crit Range
Barbarian: Rage, Crit Multiplier, Frenzy
Artificer: Blue Bar, Level 1 Spells, Traps, UMD
Elf: AA, Falchion and Ranged Damage and To-Hit
What do you guys think?