I love miracle grow, and find that anarchy is an absolutely essential tool, particularly gunships. That said, normally BA is faster than peace engine, but I had made the decision to forego teching up, which did lead to my somewhat bloated deck at the end, requiring some lucky draws to pull out the win. Ideally I would not have teched quite so many spells and more units to avoid that problem. I regretted the boot camp tech in particular, but the 2 elite trainings were worth it.
I have the same problem on thinking about worst case scenarios. Its one of the things I work on the hardest. I still trip it up half the time anyway.