I think it's great that you are planning out your practice routine, especially since you have a limited amout of time to practice. I'm in a simlar situation and putting together a plan really helped me focus and get the most out of my time.

Personally I like option #2. It gives you some variety since you won't be doing the same thing day after day. It also gives your mind and body time to absorb something new. Many times you start one something, struggle, walk away, and finally come back to find you can do it better already.

Something else I would suggest though is being flexible. You can say you'll generally do option #2, but if you are super excited about a new technique and you feel like you are the cusp of mastering it and just can't wait to keep working on it, channel that positive energy and work on it for a few days in a row. Then when it feels right, go back to your established routine.