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You could change the Rotom-Wash to Volcanion because it beats a few things that beat Azumarill/Gengar/Mega Gardevoir such as Scizor. Also you should change your Azumarill set to the one I put in the spoiler, which will allow you to outspeed Rotom-W and kill it with Play Rough if you manage to...
Almost all of your calcs are circumstantial because there are popular sets to most of these Pokémon that beat Specs TimidKeldeo.
Timid Choice Specs Keldeo has a 6.3% chance to OHKO Max HP/Def Zard X what is pretty popular amongst players because of it's effectiveness with the move Counter...
Pinsir-Mega / Unranked --> B Rank
With the ban on Salamence-Mega decided I wanted to try out Pinsir-Mega, after using it and getting blown back by pretty much every S rank Pokemon I decided to try putting Protect on the Pinsir-Mega to beat Charizard, later I realized that Endure would be a much...