Yes if your toon can solo the dungeon it will. Put DB in farm mode and set the get in que requests to nil. Then choose a dungeon and go. Now the best way to farm a dungeon is being right outside the entrance. DB will go in and out automatically resetting instance. The Dungeon finder will not put you in a dungeon too low for your level, ie one you can solo. Be careful of your rater of dungeons per hour. The consensus is that Blizz looks at the rates to catch botters. What is that rate, no one knows. Most think that a rate of 5 DPH is OK. Take breaks and act human.
Look at the bot settings, forget what its named by the effect is the same. Deathknights are not supported in DB.
U get a warning that boting as TANK in Dungeonbuddy isnt supported (or recomended). Which is just fine IMHO. Respec dps and queue as dps, it works just fine.
You did not mention Blood Spec, Deathknight is all you say. But yes BloodDK will not run DB as the warnings tell you so
Wrong, tanks are not supported in dungeonbuddy LFR-mode I believe, and it might be for the better too.
IMHO on 95% of the fights in LFR u cant tell btw a bot or some idiot player... Atm running LFR on 10 chars every week as dps. Most fights work better for melee.