Really, this is a two-part question.
1) Can you hex a Scar with Cackle and maintain it for up to a mile with your move action?
2) If yes, can you also cast Cackle and, say, Evil Eye on an enemy and if you are successful with all three (scar, evil eye, and cackle), can you then keep evil eye going for up to a mile for pretty much forever (or at least as long as you cackle, which might be the entire game?
Thanks