Nah, BorK is like 4th item and not necessary.
Get Cutlass 1st, Statik Shiv, Berserker Greaves, IE, finish BorK... last 2 items are whatever, GA, hexdrinker, zephyr, etc. After you have Shiv/IE/BorK you can solo Baron. Cutlass early for sustain + slow.
Also go Lifesteal quints.