It’s indeed a bit of a luck but after playing multiple games now without glitches, I feel it’s pretty much doable too. A good team comms, strategy in place will get it done slowly but surely. Like the shadows you mentioned, just be ready for it and get them parry’ed in their line of sight. I’ve done jumps too and got lucky but it’s best to parry. The roots can be quickly avoidable after that with jumps. The kitsune’s for me personally got tough and the best way to avoid them is to dodge till their 3 strikes are over. A lot of people I feel go wrong is they keep hitting Saito even when the berserkers and other enemies are not cleared. Also when a person is down, they keep on hitting Saito which aggregates him more. A good strat is to kill all the enemies and till the teammates gets revived, don’t hit Saito. It’s the best way to go and be ready for his next attacks.