Scaling "Murph"

There's a well-known Crossfit WOD called "Murph" that goes like this:

1 mile Run
100 Pull-ups
200 Push-ups
300 Squats
1 mile Run

I really like the 1 mile run at the beginning and end of this and the 300 squats are doable, but the 100 pullups and 200 pushups aren't happening. I could probably do the 200 pushups on my knees, but I'm pretty sure that will irritate the right shoulder, which I'm trying to take it easy on for right now. However, I really WOULD like to do this one in a few months, when I'm both stronger and lighter. Maybe on my birthday?

In the meantime, I'm thinking about how I could change this one up to get the mile at the beginning and the end along with a bunch of other stuff in between.

Here's an idea:

1 mile m run (10)
10 power cleans (1.5)
20 pullups (3)
30 kettlebells (2)
40 pushups (3)
50 squats (2.5)
40 pushups (3)
30 kettlebells (2)
20 pullups (3)
10 power cleans (1.5)
1 mile run (10)

This might be way too much. Assuming I can manage 10 minute miles, that's 20 minutes right there. Best I can tell, this is about a 40-43 minute WOD. I'm also not sure about the pushups. I can do 40 pretty easily, but again, it could irritate that right shoulder, so maybe take those out for that reason and also to save some time. If I change the power cleans to hangs, that saves a little time as well.

1 mile m run (10)
10 hang cleans (1)
20 pullups (3)
30 kettlebells (2)
50 squats (2.5)
30 kettlebells (2)
20 pullups (3)
10 hang cleans (1)
1 mile run (10)

This brings me down to 33-36 minutes, which is more doable. I could cut the run down to 1200m, which would bring my time down around 30 minutes. More on this later.