>>21894253you're coming at this at the wrong angle m8. look, you're even moving goalposts now.
fire/flying is a great STAB combo coming off a good 130 attack, which is even greater when backed by sacred fire and brave bird.
but even after that, it has humongous special tanking potential with 106/154 special bulk, while artificially doubling its defense via spreading burns. on top of this, it can heal itself via roost or recover.
defog support is pretty high in OU, but even if it does encounter stealth rocks, it can heal itself with regenerator. if it switches out while only taking sr damage, it has 20% less hp than when it comes in, which is lower than pokemon with a 2x weakness to rocks.
nothing can strictly check ho-oh in ou without suffering burns, massive damage or chasing it out, letting it recover more hp. thus, it would be incredibly powerful if not broken.