You make it sound like we can only buy 1 player, in which case a back up to Kane is the obvious priority. That is obviously not the case. Dembele could stand in for Dier, just like he could stand in for Kane. Chadli could stand in for Kane too, but those options would weaken us - and we have money in the bank (allegedly) to stop that happening.
Very well put !! and we have the money because in the last week of the transfer window we bid for Witzel and Berahino and we had already signed Son and Njie at that point.. If we were to sign two players of the level of Witzel and Berahino in January I think we would go very very close to winning the league. Poch has said we need "more" before we can challenge and I think Levi should back him in the next window!!