Found the two 2-offs (along with like four 4-offs lol). One of them is obviously fully optimal, but here's hoping the other one is actually still unoptimized, and not just another red herring...
- Edit - 7 years later: 20/43 first try LOL
I found it very challenging and was stuck at 2 off for days, I just couldn't see where to gain 2 steps. Then I saw a new order in certain blocks that I'd continually overlooked, yippee.