Phase3 terror mission vs. Androns, I got my ass kicked! They are very aggressive and will storm your position without mercy, it was also a really bad map (the train tracks one) that is too small for that many enemy units. I ended up losing all 4 of my Predator armor troopers.
When they are accurate, aggressive with high TU's and high damage, it really promotes the use of smoke grenades to survive! Without those it would have been a wiped mission