Whatever modifiers you are putting in there today are making these things impossible to clear. Just played 4 or 5 straight on 2 different maps with matchmade teams and we got destroyed every time. These are much harder than your average GM. I'm guessing this is a screw-up rather than intentional.
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Yesterday had match game modifier so tou had to match enemy shields. A lot of players didn't realise this and didn't plan accordingly. Tech set and kinetic works wonders.