I've made two tutorials on controlling basic parameters of the SourceAudio Nemesis delay with the Helix. 
  
Controling Common Nemesis Delay Parameters With The Line 6 Helix 
https://www.youtube.com/watch?v=FX77-1Tbtbk 
  
Changing to specific Nemesis Delay preset numbers with the Line 6 Helix. 
https://www.youtube.com/watch?v=4qlCk6lXMF8 
  
Enjoy.