[HoneyBadger]

Yeah it is kind of oddball. I wish regular gems in it were upgradeable, instead of just downgradeable. As it is, it's really difficult to get some of the more powerful gems, so I end up just building malachites, star rubies, silver and (occasionally) jade towers in Extreme mode. Considering that there's about 16 different tower types, maybe more, that becomes a little monotonous after the 30th round-not to mention, makes Extreme mode exponentially harder to beat.