@Angelic Diana you can just do those for fun, just remember 3 straight wins will reset the whole thing. But which berserker node are you talking about though?
If you mean the farming node then it should be opened after clearing the final chapter.
@ElDad94 for me the only nuisance was clearing the gappoly board game in the final stages. Dice roll rng plus landing on empty and bounce back blocks and bad dice drop rates from FQ. Everything else is fine. Easy free mats, simple missions and good amount of QP and embers from bonus quests. Don’t ask me about Gacha servants cause I have none. For Erice, her animations are great but might not be your reliable np looper for casual content. Just wait for @NotMalka post event poll.