At no time should Lowry, GV and Sweet Lou be on the court at the same time. You are essentially telling the Wizards that there will be no one to stop dribble penetration so you can start the lay-up line to the basket. Unfortunately, one of the biggest weaknesses in the Raptors roster is being exposed - they do not have anyone who can consistently stop dribble penetration. Players who are best suited to this role are Lowry (circa 2012), James Johnson, Landry Fields, and T Ross (yes, that is how thin the Raptors are with individual defensive stoppers). If, Lowry is injured for game three I think it is time for the Raptors to get creative and have a starting line-up of Demar, TRoss, James Johnson, 2Pat and JV. You can have TRoss guard Wall, Demar on Beal, JJ on Pierce, 2Pat on Nene and JV on Gortat. the 2Pat/Nene matchup is a concern if Nene decides to post-up on a regular basis, and the Raps may need to counter with Psycho T. GV should only be on the court when Sessions is playing. Sweet Lou can play when either Wall or Beal is on the bench. Landry can be used as the last wing off the bench to provide some defence.
If Lowry does play then TRoss is sent to the bench, and the starting line up become Lowry, DD, JJ, PP, and JV. Again Sweet Lou and GV will have limited minutes.