BG is a tricky one.
It can do the best KD in the game, 5 sec with full 100 Hate, but it has a Shield requirement, which kinda sucks, because the best BG stuff comes when doing 2H.
I'd recommend playing with shield until r40, going for a build that looks somewhat like this
RoR.builders - Black Guard
There is no "absolutely best" spec, so you can often choose different tactics for different situations
Healdebuff is decent for some situations, same goes with toughness buffing, but maybe you might want to experiment with tactics like speed upon disrupt, or if you feel you are CC'd too often get the Juggernaut Cd reducing tactic, or even experiment with Swift Fury if you feel you are out of AP too often.
however DPS 2H is where the fun begins (at least for me)
RoR.builders - Black Guard
Again there is no correct build, different people might pick somewhat different skills/tactics
However the Parry tactic in mid tree is really awesome (you can parry guard dmg)
The armour buff in mid tree is a good panic button when you feel you are getting focused a lot.
Crimson Death is amazing, and your crit increasing tactic along with wounds reduction tactic make offensive 2H BG a very nice addition to any meleetrain.
Again there is no "best tactic" combination, meaning you might need to experiment what suits best to your current needs.
If you play defensively, maybe get toughness, if you need mobility, try speed upon disrupt/Juggernaut CD reduction
or maybe you feel squishy and want the toughness tactic in mid tree when playing with 2H and drop Enraged Beating (you won't AutoAttack when channeling, so it is easier to abandon than many other juicy choices from left tree)
Some people prefer to use renown to buy stuff like Parry, Dodge/Disrupt, maybe Block if you go SnB, some want MeleeCrit or Crit chance Reduction (Futile Strikes), some just want to feel Tough, and others might want to stack Strength up to the skies.
As for talismans, you either want to get Strength for more dmg, or you might consider Armour for greater defences, or toughness if you go for toughness maximizing tactic.
BG has a lot of options, and also a lot of trade-offs, what you gain in becoming offensive, you lose a bit with defensive stats... of course you could try aiming for a middle road and get some defensive stuff and some offensive stuff, there is no "correct spec".
But just remember, NEVER TAKE FOCUSED OFFENSE
(also your racial tactics suck, but whatever, when will this casual racism towards Dark Elf race end?!??)