Got it on 2nd run for one bot, and on 3 others after 30-40 runs
2 more been running for over 80 runs and still nothing x)
All of them are Blood DK's!
All the issues i had were somewhat minor.
Having instance lock trigger often since the profile resets instances before entering and if started inside.
Average run time is 11m.
The wait for instance lock loop works fine, but it looks a little bottish standing inside the instance gate after getting kicked out > idling for a bit > run to the spot where anyone who leaves the instance spawns at > then back to the entrance.
Usually there are at least 3-5 people in front of the instance, and i try to avoid players as much as possible

I also encountered another issue when toons die (happened due to pvp), where the bot res using spirit healer and after res sickness is gone, it doesn't navigate/fly back to the entrance. Only had it happen 3 times so far!
Sometimes (1~2 out of 10) it would miss looting Slabhide, not sure if it that's the profile or HB though.
Another thing that doesn't happen often, after finishing the run and heading to InstanceTimer wait spot, sometimes the bot would have the combat disabled (i think) and have a few adds(Rock Borers that die with 1 blood boil) attacking it until the timer expires.
Similar issue happens when waiting to pull slabhide (those die in the fight though).
Other than that it's been running fine for hours on end!