What powers do you have so far? Is this a toon for certain pvp zones or overall? I have a ice/rad toon so I can you give some advice regarding the rad powers. As you will very likely know a rad's debuffs are lethal in pvp.
ATM my build is. . . . .
DARK
DarkBlast:-4 slots
Gloom:-4 slots
Moonbeam:-4 slots
T'Tenticals:-3 slots
RAD
Radiant Aura:-4 slots
AM:-2 slots
Rad'Infection:-3 slots
Mutation:-1 slot
Enervating Field:-2 slots
OTHERS
Hurdel:-1 slot
Swift:-1 slot
Stam':-1 slot
Thats it m8
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From my personal experience the dark primary isn't all that amazing in pvp. Most of it's attacks are aimed towards large groups of enemies/crowd control.
But hey, I'm just dire at PvP, so who knows? xD
the reason 4 dark/rad is 4 good debuffs my plan is to strip a foe ov thir deffences + lower their acc, so their basically stuffed lol 
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PLZ anyone out there who knows what i should be slotting(mainly for PvP) 
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Rad infection - 6 slots ASAP. 3tohit debuff, 2 defence debuff, 1 endrdx
Enervating Field - 3 endrdx
AM - 3 end mod 3 recharge
radiant aura - 3 heal 3 recharge
As for Bark Blast, that ain't gonna be doing much damage in PvP but typical attack slotting is 2acc 3 damage and either endrdx or recharge. For Moonbeam, add an interrupt reducer instead.
IN MEMORIUM OF GAYBABY
CRUELY TAKEN FROM THIS WORLD WHILE SO YOUNG
TY TY TYVM,
very helpful
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Ive been playing non stop 4 a while now and my dark/rad is now 32 XD. I just got that blackstar, it seems pretty crappy tbh, is it any good
any help or advise much aprecatied
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I currently have a Dark/Rad which i built(i really wanna rule in PvP)now LvL 20 i, after doing alot of reading up, have realized that my toon isnt slotted properly.
i need to kno what enh's to put in the powers plz(and if needed a lil explanation why if possible)
any other opinions and/or advise would be much aprecated
I just really want to kno what i should be slotting where for wen i come to get SO's
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