Board Thread:Questions and Answers/@comment-66.108.6.148-20130620041736/@comment-151.77.208.113-20130620064903

I can say those things:
 * What update you are referring?
 * Try to use your strategy for Medium. Try if that works for Hard.
 * Read Main Street/Strategies, there are some tips that may help you out.
 * There aren't minimal Road Spikes guides, in fact, both Main Street and Bloontonium Lab require a lot of spikes.
 * Also, I am pretty sure this guide works, you don't need any agent, premium, or building.