Another alternative to Maths are Befaco Rampage and possibly Intellijel Quadrax or Quadra with the expander.
Then there is Frap Tools Falistri which has its own take. I just ordered the Quadra and expander since I already have a mini-maths in my 0-coast and wanted to try something different. I am finding utilities like mixers and buffered mults super useful as I start to build more complex patches.