Best low to mid level pvp talentsFollow

I started a gnome warlock even though I love the horde, just to see what its like. I'll be using him for low to mid level pvp (up to 30-40ish) on a pvp server. What should I spend his talent points in for best pvp. I heard destruction, but also some demonology. What should I do?


btw,
name-demonology
realm-warsong