Yeah... I think spell-focusses [i.e. sceptres/canes] are a highly intrinsic part of casting CNJ/THM magic. That and cast time.
Spoiler tags because I'm rambling and I don't have sources on hand for any of this, but it all fits in with what I know/remember of NPC statements and lore occurrences.
Spoiler tags because I'm rambling and I don't have sources on hand for any of this, but it all fits in with what I know/remember of NPC statements and lore occurrences.