[Striiker]

If you can get into SolB groups, there is great XP to be had. SolB XP is pretty crazy. Bugs n' Bats at your level or as a part of an Efreeti group. SolB is good in that you should be able to get a group invite. Hole is another good XP zone, you could probably solo the entrance but a duo is better for heals etc. Further in you pretty much need to bring your own group there as it's quite often empty.
You should get into a guild (if you aren't yet). Guilds can really help with grouping. When I group with my guild in Hole, SolB, Seb etc. we always take anyone wanting to go as long as they can get XP with us. It's always fun and always NBG for looting.