Over on the Kindred reddit there's been an IE rush build that's been showing success from several Kindred players, You don't finish a jungle item, just get Skirmisher Knife and a BF sword -IE zeal(shiv or Runaan) Lifesteal (DD and BT seem to be working better than BotrK) and GA/PD to finish. There's times when After EI-Zeal you happen to back with the right about of money and finishing Warrior or Blood makes sense.
There's a huge Spike with finished IE than a smaller one with Runaan finished. There's an older Bloodrazor BotrK Runaan that has a smoother powercurve, RFC fourth. But it's more reliant on having above average Marks to abuse the AS steroid and just spread on hit reliably. But overall High AD full Crit Eventually becomes a monster. IE Runaans BT PD GA and eventually BR to smooth out AS so you can save Q for defensive use instead of Ridding it's steroid to turn IE BT Runaans into dps