I think you probably should do calcs in the future, it shows a lot of errors in this build. Firstly, you have 4 leftover EVs.
Secondly, Iron Head really isn't a good move on Arcanine. Against all relevant fairies (being M-Gardevoir, Sylveon, Azumarill and Togekiss) Flare blitz does more damage (granted it does recoil damage, but that doesn't justify a waste moveslot).
Calcs to back this up:
When you take that move away, this build seems like a more physically defensive version of Eckley's disruptor build, but far less specific to the relevant threats in the VGC tier.
Sorry if it sounds a bit harsh, but there's already a much better build write up
Secondly, Iron Head really isn't a good move on Arcanine. Against all relevant fairies (being M-Gardevoir, Sylveon, Azumarill and Togekiss) Flare blitz does more damage (granted it does recoil damage, but that doesn't justify a waste moveslot).
Calcs to back this up:
When you take that move away, this build seems like a more physically defensive version of Eckley's disruptor build, but far less specific to the relevant threats in the VGC tier.
Sorry if it sounds a bit harsh, but there's already a much better build write up