Last night (after power came back up! ) I took my Bard 14 into Reaver's Refuge for the first time. With fighter 13 hireling, Aussircaex Valley was difficult but doable. I got one rare, the Risia Portal, but it took a long time. I used Axiomatic Burst greatsword of Pure Good, and got both chaotic and good damage numbers, but every swing had 10 points blocked by DR. Is there a way to bypass it?

I was actually surprised I got chaotic damage -- looks like Risia Portal is Lawful Evil construct, much like Shroud portals are.