Issavi severs is the most popular hunting spot so far, you can hunt here with team from lvl 300 even to lvl 800+. Ofcourse the lower level you've got, the worse xp/h you'll make.
Lamassu/Sphinx north from the city and north/west from the boat - typical SD style for lower levels, but I'm not sure if profit is good enough to treat this spot as good. I guess that the only advantage is that these monsters are easy to kill by SDs.
Sphinx/Crypt Wardens beneath Lamassu/Sphinx spot - as I've heard from my friend, 700+ RP: "quite ok, but waste".
Mountain with Sun Priests etc. - exp worse than on severs, but might be enough for lower levels in team.