Ape is an extremely viable deck right now. If it didn't have such a bad GGF matchup, then it would effortlessly be tier one. I'll elaborate on why:
-Beats Magmortar (if you don't think it does, challenge me on Apprentice, and I'll likely win)
-Beats Banette (if you don't think it does, challenge me on Apprentice and I'll likely win...Although it's a lot harder than my Magmortar matchup)
-Beats Blissey and Gatr with the right techs (more situational matchups, I'll admit...Without the proper techs, you have issues vs bliss, and get torn to shreds by gatr)
-Tends to work well versus rogue, and will almost never choke versus bad lists.
RE Flygon: "Blazey" version? Go into details about what is in the "Blaze" version, because at least from my experience last format, "Blazing Apes" just bogged down the consistency of the deck.
RE Ardoptres: you mentioned just one reason why Ape is so bad versus GG. IMO, the _main_ reason why Ape loses is because of its pathetically-low HP, as well as its inability to OHKO until later. Keep those issues in mind when making Ape lists.