[DirectorTsaarx]

I haven't noticed the AI using the massive engine-destroying weapon; of course, I haven't seen the AI using the "standard" engine destroying weapons either (one of the SE3 races used it quite a bit; THAT was a pain). Nor have I seen the AI use the weapon-destroying weapons.

As for shield depleters - I've seen one AI race actually use normal shield depleters; I don't know if they'd use the massive shield depleters or not. Personally, I don't use them very often because of the 30-turn reload time. I'm about to test the massive engine depleters, mainly because I finally found that tech for the first time; I've used the massive shield depleter in the past, but it was of limited use. I've NEVER bothered with the neural net component, and I've only built one or two of the planetary shield facilities.