can I decide if the removal of the outlier should be done before or alternate feature engineering so first approach just keep the outliers until you are done with the feat of engineering so you are sure that nothing can help you in predicting the vampires or you can do something that I usually do and that is that is what I did in the second stage of the zero competition is that I made neural network because neural networks are doing feature engineering implicitly okay so if I see that I'm not able to predict with my neural network