Chapter 3-2 was hell for me. Neither RFHG or MGSG echelons could do heck against flying drones while ARSMG got heavy damage from armored units and because one way routes I often didn't have option of switching them out. I expect 3-3 and 3-4 be much worse.
In mean time we are getting free AUG. She looks hella strong to me and buff everything. She will be great in Anti-rain squad instead of forever retired M4. Maybe I could put her into HG squad too.