I don't think allen will be put in the game unless there's an injury or the game is a blow out.
He's not crazy fast and needs work on his accuracy. I don't think it would benefit anyone to randomly throw him in for a play or two then take him out.
Lamar is a different story because of his running abilities. I think he'll be used similar to EJ when Roman would bring him in for designed QB runs, wildcat, or trick plays. Maybe hard counts lol