[Arknights] DV-EX-3 CM - Low-End Squad (w/ Ling) 

Take Ling as a Support Unit (if you don't have her).
If Ling gets defeated, you can bring extra operators to bait the damage, or a medic to heal her.
Squad used :
Myrtle, E2 Lv.15, S1M3, P6 (doesn't need the Mastery 3, probably)
Fang, E1 Lv.35, Skill Rank 7, P6
Plume, E1 Lv.35, Skill Rank 4, P6
(Support Unit) Ling, E2 Lv.88, S3M3, P3, Module Lv.3 (Lv.2 module increases the max number of summons deployed simultaneously to 4)