One thing that does not come through in the summary granik linked but is pretty clear in the book (that may affect army design) is that if you use a remote or G:Servant to activate the devices, you must use literally that same model to do the whole combo. You cannot use the same Engineer or Hacker through different remotes/servants. You can however transfer the sequence from one model to another (even if the model containing the sequence is dead) by spending one short skill in contact with it (no roll needed).