If you're going to use PB as a starter why not do.

PB > DK(B4B) > TwS(IR) > SnapPunch(HowlingFist)> SnapPunch(SteelPeak) > Demolish

Why use howling fist/steel peak before setting up DK, and TwS? Seems like a waste of extra damage, I'd actually like to see the math in comparison on this one.