It doesnt matter which brand you pick, cause you can always just keep going back to the menu until your show gets the first pick, but on the other hand Raw gets the first paper view show. As for the roster, no matter who you end up picking, all of your top guys, for example like Undertaker, Kurt Angle or Triple H sign them for the 62 weeks, so you don't loose them, any mid talent like Shelton Benjamin, Christian guys like that sign them 32 weeks, and when you get down to the bottom guys, like Eugene and Daivari guys whose popularity are down in the 40's, sign them to 5 week contracts and try to juice them up, but you have to have all 20 roster spots full, so you can make a full match card every week.
Also if you get really desperate cause your ratings drop lower than the other show, go to the free agents and add a legend like Bret Hart or Hulk Hogan to the free agents and then sign them so you have more top talent