Board Thread:Questions and Answers/@comment-174.106.150.22-20130822124040/@comment-3153244-20130823063729

I only purchased the two Specialty Buildings I find most useful - Boomerang Dojo and Dartling Ammo Dump. Not that the others are useless, but I exceptionally enjoy having Boomerang Dojo combined with Double Ranga (excellent start-up for Co-op). I also prefer not to keep my cursor in one position every time I use Dartlings, so the Specialty Building is suitable for me.