For arena i got SL/Sl . just a curious thought of this spec working out http://www.wowhead.com/?talent=Iq0riRbkqZbxczIiz0xo ... i know demonic resilience is good but i also kind of wanna do more damage on my dots and drains and also that demonic knowledge is also good just a thought if could work out if descent gear.
I'd lose SM and go for DK and DR. Lose imp coa, too.
That would be 23/37 w/ one point to spend ... corruption, mana feed ... meh, a lot of locks say one point in mana feed is handy in really long arenas. I've never had one run that long.