I ran a similar set with Psycho Shift Latios at one point. I think it's worth considering over refresh.
Anyway, this team seems pretty susceptible to setup sweepers, especially speed boosters, so I can see why Aurumoth would give it trouble. I'm not sure I would have recommended leaving it without something more to deal with setups even before Auru though. Given the emphasis on hazards, a phazing move seems appropriate, rather than a random scarfer or something. Roar/DPulse/Refresh/Calm Mind Latias would be a good option in my opinion.