This is pretty solid.
For optimal performance I'd go.
Monday: Easy Shakeout run before lifting
Tuesday: Tempo or Threshold reps
Weds: Off
Thurs: Easy to Moderate run 30 mins to an hour + Strides
Friday: Fartlek or intervals
Saturday: Off
Sunday: 60-90 mins easy
I listed a 5 day schedule, but it's probably better taking off the day after the workouts, unless you really want to take Monday off, but I'd hope on the treadmill for 15 to 30 mins just to warm up if you're going to lift anyway. This way you can shake off the rust of the Sunday long run.
Based off of this plan, I'd say you'd run very good if your Tempo pace is 5:50, I'd say if you continued this training consistently you'd always be in about 4:35 shape to 4:50 mile shape.
Hope this helps
-RS