It doesn't really matter if Chandelure is vulnerable to SR, Spikes, and Toxic Spikes because you can just run Deoxys-S and HO to prevent your opponent from ever getting them up. Volt Switch and U-turn can also get it in without taking any damage and then either trap and kill whatever came in or start setting up. Even if your opponent does get hazards up, Spikes and Stealth Rock don't really matter because Sub Calm Mind Chandelure only needs to come in once and will sweep unless your opponent has two physical Pokemon that can outspeed Chandelure. Even then, Chandelure is guaranteed to get two kills; one kill comes from the Pokemon that it traps and the second kill is on the Pokemon that breaks the sub. The only way to prevent Chandelure from sweeping your team is either run Shed Shell or an SE move on all of your Pokemon.