-Completely utilize the MST (stealth and sniper). Kill all Brainbugs first before you make an attack. Make sure the Brainbug is dead or the Warrior bugs will track you. Do not jump if there are Hoppers above you. Always do the formation if you encounter the Hoppers.
-Ambush Arachnids whenever you can by using three squads to form a "U". Run a couple Mobile Infantry under the bug's nose and lead it back to your trap. Repeat this if needed for the large bug swarms.