Until we have a set up and system that supports a striker then it doesn't really matter who we play as a number 9, yeah ok we would probably be scoring more with Kane but then it's Kane and he plays much deeper than a 9 so we would effectively be playing without an out and out striker, and a player like Kane would either be in the same space occupied by Bruno and which ever other 10 ETH plays, McT or Mount for instance, or he would be behind them.
The problem is the system, Rasmus is plenty capable of scoring but he is living on scraps, until that changes there is no point talking about a striker, to play with or instead of him