Best secondary profession for farming ranger?

Ok..here is the deal.Im not gonna post where i farm.but...im currently a Ranger/Ele..and...im doin pretty good so far when i farm..i can take on 2 lvl 22 at a time with almost no sweat..BUT..i want a little more..since most enemies travel in groups of 3 or more...wut would be a good secondary to aid that..and..wut skills and spells should i have handy??