Originally Posted by Fat Paradox
You made some very good points in this post (though I can't see Landorus countering Flying/Fighting). However, it seems to me that Gliscor is pretty arbitrary to bring up as something that could beat Flying/Fighting instead of Flying/Water. First you assume that it would be physical, then you ignore that just like Gliscor can take the neutral attacks from Flying/Fighting, many walls could take the neutral attacks from Water/Flying (and in the same sense, many offensive pokemon can switch in on resisted water attacks and set up like Reuniclus on /Fighting). So just as much as Gliscor is a counter to Flying/Fighting, Skarmory, Gyarados, Suicune, Dragons, etc can counter or take advantage of Flying/Water. And don't give me that Gliscor is a far better momentum gainer than they are, because that's not true. It almost seems as if you want to reduce CAP 1's viable switch-ins to 2 pokemon...
Still, your arguments in favour of Water/Flying are certainly valid, and I agree that it is a legitimate typing. It is important to consider how switch-ins can be limited, though this doesn't necessarily have to be solved entirely in typing (stats, status, substitute, WW, Abilities, etc could go a long way in dealing with a lot of the problems you brought up)
First of all, thanks for the appreciation^^ I'll try to answer some of your points.
About Landorus countering Fighting/Flying: I don't intend to say Landorus is a counter in any way (since even if it were to go pure Physical and with STAB moves only, a STAB Brave Bird or Drill Peck would pound even 89/90 defenses). But if our CAP is actually Fighting/Flying - and especially if this CAP uses Close Combat - it takes little for Landorus to switch on the resisted move and regain momentum easily. While certain mons can do the same to a Water/Flying too, I find them to be less threatening than the sand genie.
About Gliscor: if CAP is pure physical, aside from Ice moves it's not gonna break Gliscor. If we assume for example he has 110 base Atk, and he has Brave Bird (keep in mind he could even be stuck with drill peck), he's not gonna do more than 40% roughly to 252HP/0 Def Gliscor - even less to more defensive versions. Keep also in mind that, between Poison Heal and Protect, you need to do over 60% most times to grant a 2HKO on Gliscor. Meanwhile, he can do several things to you, depending on the set. He could U-turn, he could Toxic (or Fling a Toxic Orb), or he could simply maim you with Acrobatics. Probably not a counter, but still a good check unless we make specific choices with stats and movepool. And my point is that we should try to have as few restraints as possible on future steps if we can.
About the list of mons which could take on Water/Flying: Skarmory and Suicune are certainly less threatening than Landorus, Reuniclus or Gliscor most times - and Suicune is kinda uncommon too. About the others, if we still assume physical 110 atk and Brave Bird, many dragons and even Gyarados are gonna have an hard time switching in. Also, keep in mind that, among those, only Garchomp and Latios boasts more speed than Landorus, and will take significant damage on the switch in. The others are slow enough to have to take 2 attacks before being able to retaliate.
And about the "I want to limit switch-ins to 2 mons", I'm sorry if that was the impression. My intention was limit switch-ins to a list of Pokémon which could possibly count Pokémon who for the most part don't show up commonly together on the same team, so that you can be sure about what your opponent will switch into CAP.
Anyway, I still think fighting is a strong choice (although DK's post makes ghost intriguing too) - just, I think water has a little advantage, and gives us more leeway down the path.