The zombie ruins near the EC zone line (along the wall, not where Travis Two Tone is) is a good spot til level 7-8 I think? Those mobs single pull, but don't try "a lesser mummy" if one spawns - see if a random higher level player will kill it for you.
From there some people go to EC, to orc 1 or just to kill the various wildlife. Watch out for griffins. North Ro (through the tunnel) is another option around 10ish ^^
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