Armor sets in DKSWell, you can wear the Rivellon Guards, and the Defenders of Aleroth, and Aleroth Archmage sets as a dual-wielder, but I recommend the Ulthring set. You acquire that by
Mind-reading various Black Ring members just before you fight them. Xanlosch, Stone, and Raze. I don't remember off-hand who the third member is. It's not Keara, though. It might be Kali.
Also, none of the FoV sets include a weapon, so any of those will do, although Order of the Viper is probably your best bet there.