Ok, one hasn't been done yet... and honestly I'm not that familiar with Da Boss tree - I know it has some decent buffs but not overly useful as a dual pve/rvr build. Correct me if i'm wrong there.
The build's I've been through (rr55+) have been mostly brawler / toughest.
Da Brawler offers a lot of boosts to a DPS build, including 'tree hit combo and most of the abilities used for dps, essential for any "dps" BO. I tote a renown spec in strength and block %. Put a 2h on and it's a decent dps build - strength nearing 800 (not that great for a "dps" i know - but as far as BO's are concerned it's getting up there...) and wounds still at 1k - toughness takes a bit of a hit though and drops to around 700. Talis and gear can get your main stats (init/wounds/tough) to a good point for MT'ing anything.
The toughest tree offers Can't Hit Me - an essential ability for any pve BO. Coupled with the tactic which returns AP for every time your war bellow triggers.... an amazing combo for a never ending AP pool and good hate generation. Menace with Can't Hit Me and that tactic is an easy and effective way to clear trash in any dungeon (including some bosses). Just challenge to get them all on you and click CHM - watch the "block" messages fly above ya. Tanking gear - invader/sent (for the % crit reduction) i'm usually sitting at <1% chance to be crit, 1k+ wounds, 900 tough and 4.5k-ish armor (around 100%), block at 38%ish. A pure tank would go toughness or initiative renown spec - then boost the other via talis and jewelry. I prefer to have a bit of flexibility to go into the rvr lake and actually hurt the healers instead of just nibbling at them, which is why i went strength renown spec, the extra 100+ strength just from that makes a noticeable difference.
My BO carries 3 sets of armor around depending on what situation he'll be in. One set has strength talis for a pure dps idea - one has mostly armor talis for pve tanking (and some rvr) - and the last is mostly toughness for a defensive rvr build. Again, this is to have the flexibility to MT LV or ToVL and then turn around and RvR with a 2H. Not the perfect "dps" BO, or perfect MT... but close enough imho.
Well, feedback and comments welcome.
