Fighting shares no weaknesses with Normal / Flying
Which is a good thing, no matter how a put it. I understand your point, but I already talked about it and Fighting does it better. The only way Ground is ever gonna hurt the many troubling pokemons is to predict the switch and use a SE move... Not so reliable, especially when Rotom, Zapdos and Gengar can switch on your STAB.
However, we can use the fact that Fighting gets perfect coverage with either Rock, Ice or Ghost, types to which every single Togekiss counter is weak. This leaves us many wait to lure in and kill them. You can use expert belt to fake a choice item. You can run both of them and show Ice Beam, only to kill Rotom coming to absorb Fighting, or show Shadow Ball to dispose of Zapdos with Ice Beam or Power Gem.
That's fair, but it's impossible for Normal/Flying to get perfect type coverage. And the closest it gets is with Ground being one of the primary types. So what is Fighting doing in the picture
Fighting/Electric is even better : with every Electric-type and their brothers running HP Grass or Leaf Storm to kill swampert, "only" resisting Electric is good enough.
Offensively Fighting is redundant.
As I explained many times, and as most agreed on Concept Assessment, redundancy is good for Togekiss, to cure its moveslot syndrome. Only the NP sweeper has room for Aura Sphere !
Let me say this again: Why. Is. Togekiss. Switching. In. On. Ice Beam/Surf?
Then, following that logic, we could just as well make CAP11 Flying/Normal. Why would he switch on Tbolts, Ice Beams and Stone Edge, anyway ? Oh, right... That's called defensive synergy, and it's the only reason to choose Ground over Fighting. I don't think perfect defensive synergy is need important for Togekiss, but at the very least, it shouldn't attract then be forced out by Togekiss' counters.
a fighting type is susceptible to Thunder Wave
There are no rules stating that, we make the pokemons we want to. "Rock types are physical and slow" didn't prevent us from making Stratagem. Actually, Fighting-type, by itself, is one of the least susceptible to TWave typing because it has both physical and special priority moves. I think a slow, bulky and specially offensive Fighting type would fit the concept very well.
The CAP project is to test how pokemon will function in OU, not along with the rest of the new pokemon, correct? So unless colossoil became togekiss' greatest partner already, in which case this project would have been rejected, then it is not relevant.
It is relevant because Colossoil has everything we would give to Ground CAP to help Togekiss (Electric immunity and ability to remove Rotom, Gengar, Zapdos, Starmie...) and IS, in fact, Togekiss' greatest partner. However, it is also Gyarados' perfect partner for these very same reasons, despite being weak to Celebi and bulky waters. As "Gyarados minus its electric counters" is better than "Togekiss minus its electric counters", it's used with Gyara and not with Kiss. It is definitely relevant, not "because we already did it lol", but because it shows that the caracteristics that you want to give to CAP lead to a Gyarados partner.
Maybe because Air Slash is really shitty STAB without Fighting move coverage? It'd make an incredibly predictable core, something like "Togekiss NP's, SpecsJolt switches in". Let's see, we can switch to our Fighter and take a ton of damage, or we can keep Togekiss in and die. Now let's try "Togekiss NP's, Zapdos switches in". You switch to your Fighter, and oh dear it's taken off half of your HP. "Togekiss NP's, Rotom-anything switches switches in" Well, STAB TBolt is still going to take a ton off your fighter,
Secondary type says hi. It's so easy to add a resistance when you don't have an ice weakness to cover. Fighting/Electric is flawless, but there are no good Ice-resisting Ground combination.
and if they're running, say, Overheat, I hope you've got the special defenses of Hariyama there.
As far as I know, Ground doesn't resist Fire either, but it is weak to Hydro Pump, Leaf Storm, Blizzard and also HP Grass/Ice that every electric type run to beat Grounds. Also, our CAP could very well have the bulk of Hariyama. BTW, don't be fooled by its high HP, it is less bulky on both SpD and Def that Snorlax is on Def. It seems so bulky because of it's good defensive typing.
Basically, not running Aura Sphere drastically lowers the damage dealing potential/usefulness of Togekiss.[/QUOTE]
Doesn't have many resistances, which prevents it from being defensive, which is important to it's core
Before saying that Fighting is a bad defensive typing, try to remember how bulky Machamp is, now look at its defensive stats, compare it to Salamence's while keeping in mind that Salamence has Intimidate and you'll understand my point. A few key resistances and no exploitable weakness is all it takes for a good defensive typing.