I don't know if dropping $1-2 million into Utah in October is really the smartest move, unless things look really locked up by then and team Hillary is just sitting on piles of money. The only downballot Democrat that would help is Doug Owens, and he seems pretty good right now anyway. Would probably be best to dump that sort of money in states like North Carolina, Georgia, or Ohio, that money can really help Democrats in Senate races there.
Maybe do a small buy in the Republican primary race promoting Johnson - he only leads the Democrat in the race by 13, as opposed to Governor Herbert leading the Democrat by nearly 30.