I'm playing a low quality LA hotseat with my brother.  I am Ulm and he is R'lyeh.  Atm we are semi even with slight advantage to him.  How do I counter the chaff protected illithids?  Unfortunately I don't have a lot of gems or income since we're playing with fairly low settings, but I have a lot of blood slaves and all blood magic researched.  I also have full construction.  Please Help! 
