alright here is the dataz for warlock
things that you can do which will increase your EDPS (effective dps after crit haste and everything is factored in)
change to serpent gloves.
change to cloak of sorcerer
upgrade your bracers to mind thrust or ivy cloth . what ever you feel like doing (mtb for more survivability ivy for gc)
stillwaters to garoshes or bronze band of force. garoshes for stam or bbof for gc
if you feel like it drop your pvp trinket for a int trinket but then u run with no trink........ up 2 u
when u get lfh change the garoshes pardon to a lavish jeweld ring and you will still be hit capped.
your imp also provides better over all dps and can attack from ranged so that is also something to consider . you loose burst though. (i guarantee you will do more over all with imp though if thats what your after)
crit boots , crit pants crit rings are all worse then pure int as a destro lock so don't bother. (in terms of effective dps)
good luck and have fun