Hmm yeah, the first few exos or waves from building the hubs etc can almost be ignored if you have defence in depth, however I almost ditched my game ofter building the galactic capital. WOW, not to be messed with. I'm dreading building for the alternate ending.... If there wasnt so many HK's it would be better, or if they weren't immune to so many things, emp for example or nukes for example. But thats just wishful thinking