Level 11 was hard, I didn't hack it at all, but the trick to me seemed to be micromanaging. I'd invade the first five hexes as soon as possible, and split my forces across the two weapons specialist hexes. I would only morph halfway, so i'd have half armored, and half weaponed buzzbots. Enough armor (To show a white layer) to pass the purple, but enough damage to kick ass.
It shouldn't go completely smoothly from here, as you have to take their hexes gradually while killing their buzzbots. As long as you outnumber them it should be fine. It's also not bad to have two or three buzzbots completely on weapons to hit them from afar from both sides.
Only thing I hate about this game is that you can't hold position.. and orders go back to default once you try reproducing. So be careful.
You'll probably find level 13 hard, too. This time just take everything you can on your side. Your enemy will try to make weaponized buzzbots, but all you have to do is completely morph yours to sights, and fly around theirs because they have terrible turn rate.