East Commons is ok, although it would be a little slow; it used to be more fun when you could find other people and join a group killing at the orc camps.
If you want to try Paludal, this is how to get there. Take the Shar Vahl stone to get to Shadeweavers Thicket. Follow the path north, taking care to dodge the skeletons and rockhoppers. They are higher level than you at this time. Take the cavern entrance at the end of the road, and use your map to find the way into Paludal. Stay high up on the sides of the tunnel; only the bugs here will aggro you, but they are nasty at that level.
Once you are in Paludal, you have two choices. You can kill the bugs at the entrance, but they are social and will gang up on you; or you can follow the passage in to the first cavern with a lake, and kill the reishi sprouts. They are tougher than the bugs, but guaranteed non-social. The only things that will aggro on you at this side of Paludal are the fiends, which are deeper in.
