Hey guys, I was hoping someone could let me know which will give me the highest xp/hr in dungeneering the small or medium rooms.

Medium :)

I believe it would be more xp/hr to complete your lower level floors as small dungeons, and your higher level floors as medium. Although if you want maximum experience you'll want to do teams of 5 with small dungeons on the lower floors, and teams of 5 with large dungeons on the higher level floors.

 

Seems like you prefer solo though. |^_^|