Don't worry if they are too powerful for you - they do NOT repair or recharge their shields. Focus on just one of the bases and just attack it once per hour, day, or week or whatever. As you rank up and research, they will get easier to damage and kill, I assure you. And each time you kill one, they drop an artifact that you might like.

_________________"Anyone without a sense of humour is truly at the mercy of the rest of us."
My folding@home stats

