I want to create 3 queues and want to assign cases on the basis of queue size like if Queue 1 is full then I want to assign the task in Queue 2 like this.

I have 2 Visualforce pages and I want to override the New, View and Edit actions of one of my custom Object. The New and Edit works perfect, but the view button still opens the salesforce standard page even it shows visualforce page overridden in object setup. What should I do in this case. I can place a button on record home page which takes me to my custom page but I want to override the view action of my custom object in lightning experience. It works in salesforce classic very well.
Your suggestions would be well appreciated.