I know this is kind of a small level window, but I found a great place to solo last night. In EL next to where the beatles by the docks are there is a bunch of small lumped together mobs (2x No Ups Linked, and 2x 1 Down and 1x 2 Down Linked). I beat on these for about 20 minutes last night and pulled around 10% exp with vita. The not only give basic kill exp, but bonus as well. To make them easier use Jeer or the training Jeer and send one scuttering while you beat the snot out of the other.