Which Gym Set Up do you like Better
A) Blissey Gardevoir Snorlax Clefary Chansey Dragonite
B) Gardevoir Blissey Clefary Snorlax Dragonite Chansey
Idea is to break up the 3 normal pokemon with 3 that can hurt Fighting, and put some hurt on Tyrantir/Dragonite.
I'm just not sure which way seems best when factoring in Golden Razz.
Blissey: Gains the most time when Razz
Gard: Does more damage with Confusion and will be a bigger potion drainer.
Answers
The way I would beat these gyms is with two fire types because they resist Fairy and something for Dragonite, probably Golem or Cloyster. The first round would certainly be annoying, but after that I can hack right through. I, personally, have two leveled up fire types, not so sure about other players.
It's impossible to stop an attacker. All I want to do is make the gym as annoying as possible.
If your using Fire Types, they won't resist the quick moves (Conf, ZH), and they won't do Super Effective so will take longer to dispatch the Blissey, Snorlax, and Chansey then using a Machamp/Dragonite/Tyrantir.
So all in all, yeah your going to win, and a couple fires might be best option. But all I can do is cost you as many potions or myself as few Golden Razz as possible to make you not want to bother.
Me personally (not a gym player but want the 50coins) I wouldnt attack if I had to go more than one round.
I usually pass about ten gyms a day. As Im red (and not blue) I can't afford to just put in the pokémon in gyms that are already my colour. I'd do it. But I would never attack a gym which a) I have to go all 3 rounds or b) more than one round against multiple annoying Pokémon like Blissey, Snorlax, Vaporeon and co. Specially not in winter. And Im sure that's how most people play the game.
So I think u put too much thought in it. Neither can u control what your teammates will do with the 5 other spots anyway.
Maybe u would even motivate a few attackers because they'll consider it a challenge against a perfect defending team?!