My thoughts were expanding on from the 2hp ARP. I see the Midi tile so I am not sure how much sequencing you are doing externally, but the WMD Arpitecht might compliment the Chainsaw and Ensemble nicely. Should be a quick fun way to get some really nice sounding sequences. The ALM Beast's Chalkboard would also work well in having differing octaves across oscillators. The ALM Boss Bow Two would be a good addition to triggers to form complex rhythms based on the initial arpeggio(also for CV)