Last night I tested the server especially Raid Bosses.
So I killed one and it gave me 650k exp and 1 ring.
Also I killed a mob next to it and it gave me 170k exp and 20k gold adena + resurses.
Ideea is that I think the RB are not properly set can you please check on that.
I want to mention the RB level was 23 tough I still think its low exp and drops