Board Thread:Questions and Answers/@comment-20126248-20140415044518/@comment-3224196-20140416232124

Spiked Mines, while expensive, are an investment you will never forget. They will only fail you on MOAB Packs (possibly, haven't tested), BFB Packs (ditto), and ZOMG tiles. However, if you can get two, then you can use assumption to see if you need a Monkey Boost, which, if timed correctly, can defeat even a ZOMG.

Not sure if MIB: Call to Arms works well, but why shouldn't it? It doesn't cost Bloonstones, though it does require plenty of XP.