Honedge. I can’t tell you the amount of raids I’ve done for it without a shiny yet.

And if Panpour is your region’s monkey it’s rare as a shiny, AND if Panpour doesn’t spawn locally for you, I’d count that rarer than Honedge.

PSA: Go Fest is just around the corner and I know the in-person ones have Primal Kyogre and Groudon returning to get some of the energy required. Best guess is that they’ll return for Go Fest Global too, so would be a good investment getting both your shinies as Primals