Putrefier used an Arturia Beatstep sequencer to control his modular at a recent gig in Helsinki. The Pro version with multiple channels.
Trepaneringsritualen clearly uses sequencers and samplers also. He works or at least has worked for Elektron, a company famous for their advanced sequencers in their instruments, so that makes sense.
Himukalt has also said that programming samplers and drum machines is a large part of her work.