Yep, that's pretty much the winning strategy. We figured it out during play testing as well, but there wasn't enough time to add more complexity to the AI.
Out of curiosity, how long did it take you to figure that out?
hmm, noticed the enemy switching pattern 30 seconds in, then how it reacts to mine in about 40.
Yeah, ok that's definitely too early to stumble across a winning tactic. Thanks for the feedback.