Affliction with some points in demo for stamina. Haunt does damage as well as gives you health. so dont think haunt is useless now that you have a pocket healer.
witha healer you might be able to lifetap without end, so darkpact might not be necessary. try it with and without darkpact and see if this works for you.
if you want to level fast, i suggest learning to drain tank with your warlock. its by far the fastest way to 70 with a warlock. be prepared to be constantly micromanaging dots on multiple mobs. i would also use the succubus or the felhound.
good luck.