Hate to break it to you but no way you can do brawlers as a blood tank.
I think i managed to pull off doing the first 5 bosses as blood before i hit a wall. And my gear was much better than yours. I was in full epics. You will need a dps spec to progress in brawlers guild.
Brawlers guild isn't a good place to test your DPS as a tank. Most of the fights have relatively low melee damage (and thus you don't get much vengeance) and some specific 'avoid this' mechanics. You can do a fair amount of brawlers guild as blood (but wearing dps gear, provided you have good dps gear) but for many of the fights, a dps spec will be better.
Was this query just about Brawlers Guild, or were you looking for more general help doing dps when tanking? The latter shouldn't be too hard, as long as you are mashing all your buttons, spreading your diseases, getting plenty of vengeance, remembering to use dancing rune weapon, etc. You might find roiling blood an easier talent for the kind of content I think you are doing than plague leech, but nothing else major stands out from your armory. You could do more dps if you increased your expertise, but that is not necessary for survival.