You are on the right track with your routine. Try the following program
Friday - Pitch
Saturday - Light Throw, Distance Run (20 Minute Min)
Sunday - Regular throwing amount, long toss is ok to help with soreness. Distance/Sprint work. Workout routine if you have one
Monday - Bullpen Session (25 - 30 pitches) Work on what you need to work on from previous game. I recommend 3 of each pitch from the wind up and 3 of each from the stetch. command your fastball. Run - whatever you feel up to
Tuesday - Regular throwing or day off is fine, sprint work
Wednesday - "Touch/Feel" bullpen. nice and easy just to keep the feel of the mound. maybe 15 pitches at 60 percent. distance run
Thursday - Light throwing. Sprints
Friday - Dominate