Board Thread:Questions and Answers/@comment-90.200.72.39-20131220020041/@comment-27014396-20151015130332

2/4 Bomb Towers are Frag MOAB Assassins, so of course they're better for popping MOAB-Class Bloons, but if your strategy is to place a Bomb Tower at the first round, provided you have sufficient money for future rounds, Cluster Bombs should be first.