Defeated this mother (alongside my partner) with 16 rexes (levels ranging from 20ish-60ish and were putting points towards health and melee damage), 1 megatherium (cause they get a buff since it’s attacking an arachnid and we needed an extra Dino) 1 yuty (with auto courage on) and 2 daeodons (with passive healing). Defeated within a minute, we basically just sat there on our Dino’s while the rexes destroyed the mini spiders and the boss. This was on Gamma difficulty. Will do beta and maybe alpha with rexes but debating on using megatheriums instead of Rexes. Just a tip for people who are new and don’t know how much power or what Dino’s they need for gamma :)