Seeing as thats the tactic you use, I don't think 300k+ is realistic in your gear.
Your damage breakdown looks fine.
As for beard: he's not hitcapped for one. You both need to work on your openers a little bit as well, try the glaives 2 seconds before pull to proc trinkets early and then make sure you follow your priority correctly.
Syncing stampede with AoC proc is fairly important for BM too. Yours seemed to proc before the logs even began and your stampede didn't come until 2 seconds later. You could probably ask your shaman to BL like 2 seconds after the pull as well just to give peoples trinkets a chance.
As far as I can tell the effective uptime on the boss is around 5 minutes and your ability usage does seem to match up with it.