>>534528496
Same but I was told the trick is Mash with BG + Oberon (my Mash is 90 so Olga survived with 200.000 something Hp)
You also need 3 teams to deal with her. Try to squeeze the other 9 nodes in to 7 team, it's doable, (especially the Lancer on 9th node can be dealt with the team that clears the 8th)