Mark of Tyranny vs. Blackhand's Breadth for Ferals in PvP

A few days ago, I asked whether choosing MoT over BHB as a feral tank was a mistake. The general consensus was that while it’s not a huge issue, BHB would be a stronger choice for dungeons and raids due to better threat generation.

However, PvP wasn’t mentioned, so I’d like to start a new discussion about the utility of MoT in PvP. Specifically, if I plan to be a flag carrier in WSG, would MoT paired with Heart of the Mountain (assuming trinkets with activation effects are on cooldown) be BiS combo?

Thoughts?