I hate to be that broken tape, but you have no VCAs here. Warps could be used as one but that's a terrible waste of a Warps. How do you plan to create sounds that has beginnings and ends, as opposed to those that play infinitely; how do you strum your synth like an instrument; where are you patching those four envelope generators to? If you don't have an answer to these questions, it means you need a VCA (i.e. a voltage controlled volume knob).