Goblin Goblin Golem Healer Goblin Goblin Goblin Goblin Golem Healer Goblin Gobling. That combo will let you get gold on every level w/ max upgrades. If there's a bog tower zap it for the round. If there are holy towers use quake while the leader passes. Atomic towers can be mostly ignored except in very high wave numbers, in which case just catch them in quake. Generally arrow towers are the most dangerous since they continually pick off leaders. AOE is laughable since healers pretty much negate it. I can usually nearly double the wave number required for gold on higher levels, and 4x or even 5x on earlier levels.
 "Villainous"){kind=icon}