59 Warlocks are great fun
Hi,
I have a 59 twinked warlock that is great fun.
I find that 1 on 1, or even 1 on 2 DK's, I tend to mostly beat them. 3 DK's usually always beat you though due to being hurled all over the place before your damage sinks in .. we hurt them on the way down though.
As for what to spec I have tried a few variations but the 59 bracket is a very responsive type playstyle..You can't just DoT and forget like the lower levels , you need direct DPS and stuns etc to be effective.
My warlock tends to top most BG damage meters and is really great fun to play.
Just for a reference heres the armory page.
The World of Warcraft Armory
I still have a few item upgrades i'm working on which will increase the + spell damage. Demonolgy is the way to go IMO. with the felguard out she has +430ish Spell power before additional buffs
Demonology gives you a bunch of nice PvP tools like Demonic Knowledge which lets you double dip for extra spellpower (around 100 more Sp). You also have the felguard intercept stun which is an awesome tool. Not to mention I love sicking him on a gnome and chuckle to myself.
As you can see though just a little work on Quests in Outlands a few handy enchants she has 6166 health and 5477 mana unbuffed.
I highly recommend spell penetration to cloak .. I had a while there where i got frustrated by DK's until I added this enchant.
Affliction warlocks have had a bit of a name as cowards that run and dot .. Demonology lets you go face to face with melee toons (so to speak). IMO Destro locks are painful to BG with unless you mainly attack from range to assist other players
Oh also you'll notice the professions are not geared to PvP so you could get additional benefits from that as listed above.
Enjoy.