I am using Shakmat Dual Dagger stereo filter with my Acid Rain Chainsaw and it works great. For sequencer, in that small case, I use Endorphin.es Ground Control which works great since I can build a sequence on one voice and play another voice on the keyboard in real time live situation. It lets me send both 1v/oct and gate triggers to Chainsaw and also has 8 triggers for percussion modules. I can create and save patterns for future recall and the new firmware has additional features.
I use Queen of Pentacles for percussion and they play well together. VCAs- I use 1u After Later Audio DVCA and Plum Audio 1u Apex for modulation. These work great in my small 4u palette case.