So i did that level 30 instance the "Ascalonain Catacombs" and i have got to say.... it hurt alot and what i mean by alot is we died/wiped all through out the place. It was funny and way to over powered in my opinion.
The screen shot below is of the 2nd boss room theirs 2 bosses and you have to keep them apart or they buff each others dmg, well we did and i noticed some boulders around so i picked one up and chucked it at a boss. It knocks them down and they stop casting so thats why i said Stone Them. lol
Edit* now that I think of it, it mite have been the third boss.