Sterak's Gage buildpath + possible alternate AS-based jungle item.

Another idea I'm not sure about, but whatever. I just like theorycrafting.

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Primal Claw

Long Sword (360) + Dagger (450) + 390 = 1200

+20% Attack Speed (600)

Unique Passive - Force: +25% Base Attack Damage (360 - 1332)

Stat/Gold Efficiency: 80% - 161% based on Level

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Sterak's Gage

Primal Claw (1200) + Giant's Belt (1000) + 600 = 2800

+500 Health (1350) +20% Attack Speed (600)

Unique Passive - Force: +25% Base Attack Damage (360 - 1332)

Unique Passive: Upon taking at least 400 to 1800 damage (based on level) within 5 seconds, you gain Primal Rage for 8 seconds (45 second cooldown).

Primal Rage - Gains increased Size, +25% additional Base Attack Damage, +20% additional Attack Speed, and a shield equal to 30% of your Maximum Health that rapidly decays over the duration.

Efficiency: 83% - 117% based on Level, before the passive effect(s)

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Enchantment - Ravager

Primal Claw (1200) + Jungle Item (850) + 200 = 2250

+25% Base Attack Speed +40% Attack Speed (1200) +30 Bonus Gold per Large Monster Kill

Unique Passive - Force: +25% Base Attack Damage (360 - 1332)

Passive: Basic attacks deal bonus Magic Damage on-hit equal to 50% of your Base Attack Damage.

Efficiency: ?