This sounds easy on paper, but in the battle is pretty hard to pull off, as many can attest to.
First of all, if someone wants to try out this kind of teams, you have to be very patient. It takes some time to finally get engaged on this kind of teams, since after playing all your "poke-career" with bulky teams that switch a lot, this style becomes basically "new" since you basically dont switch at all (last thing you want to let your opponent get is momentum).
Second, having momentum on your side. By always keeping the pressure on your opponent, forcing switches and playing easily, you get the best results. A nice example could be this:
You got a DD with your Kingdra, your opponent brought in a Salamence. Now, you are at +1 speed and +0 attack. Most players will rely on switching to Scizor or any other shit like that to take the Outrage. Never rush to finish an opponent's poke in this situation. Your best bet here is to just plain Substitute. Dont go in mindgames of "will it stay to hit him with outrage, should i DD, should i waterfall, gaaaah". If your opponent switches, bam you got a sub and more chances to set-up, while SR takes a toll on the opponent, AND will potentially get swept. If the Mence stays oh well now you are sure it will stay in so blegh kill it. Of course someone would say "HEY HE CAN PREDICT IT NOOB", but in a real battle, the pressure can get so high, that the opponent is more prone to either do mistakes or not think correctly.
Third and an important one, this kind of team gets REALLY screwed by luck factors. All the momentum you build in the course of the match can be lost easily by a Stone Edge miss, a crit from a Swampert's EQ, or Flamethrower burning you, etc. So when playing this, you need to always have a plan b, in the event this kind of shit happens.
I wanted to answer some questions so here i come:
A) How do you deal with lead metagross
My Azelf spread beats Metagross always. Here is how it usually goes:
Reflect Turn 1, they MM for 35%~
Taunt Turn 2, they SR or MM, if they SR I got it right, if they MM then im left at 30%~
Stealth Rock Turn 3, as they kill me.
Then the fun starts, Kingdra can set-up on Metagross, and also scout explosions, which is pretty cool, or when im feeling confident I go to Scizor, who is faster than Leadgross and then decimates it.
B) How do you deal with staus (Say wisp rotom)
Thing is most thing usually dont have time to status you, and if they manage to do it, they are rendered pretty much useless. Example +1 Mence vs Rotom. Mence 2HKOs even after a Burn, so Rotom is doomed, weeeee Scizor sweeps.
c) Who do you send on double switches (say Lo kills somebody)
Depends on who I have left, usually the one with lowest HP, OR Metagross. Mainly because Metagross beats so much shit 1 on 1 that its very good. Also, I was forgetting, most people, if their lead is alive, bring it for a Double Switch after dead. So if your opponent's lead is Metagross and has like 50%, bringing Metagross is your best bet. Or if they have Heatran, Salamence can come in. Its just a little tip that usually works.
Also the complicated question, doesn't choice scarf present a serious problem.
A lot of people make the mistake of thinking Scarfs are a total bane. Of course they are annoying, but they are easily played around. Better yet, this is why I have both Lucario and Scizor. Their priority is so strong that they can beat most Scarfers. Scarf Rotom after Overheat ends up being Mence fodder, so yay Mence can sweep after Rotom kills Lucario.
Is heavy offence still viable nowadays with all the rotoms around here?
It is still viable, yes. Harder to pull-off of course, but since a lot of Rotoms are mostly scarfed, its a nice way to get momentum on your side, not even mentioning that Tyranitar in HO totally fucks over Rotom. Defensive ones are always a pain, but by weakening it with lets say Salamence, Scizor can come in, finish that ghost, and then have an easier time, not only for him, but for Gyarados/Lucario/Metagross.
Is there a better solution to rotoms? (I tried heatran to absorb wow)
Rotoms will be a pain, but basically, by using the "concept" of this kind of teams, you can pull off a lot of things. In my specific case, most of my teams have even 3 things that get walled by the same thing. So once I can weaken the Rotom, the opponent can fall pretty easily to the other 2 broskis.
What is the best HO team you used in HO? (is it the one you posted?)
I started using Azelf/Gyara/Mence/Nape/Gross/Kingdra. This was one of Stath's teams when he started explaining HO to me, so I had to use it as a template. Eventually, with patience and a lot of battling, I got the "ability" of making my own team, and in my opinion (not like it matters, I just like to have good self-esteem) is one of the best physical HO teams.
It consists of:
DS Azelf - I have a nice "bond" with this pixie, mainly because I managed to get an Azelf spread that beats every lead (barring aero of course).
DD Kingdra - This is the thing that usually comes after Azelf falls, getting my DS. Kingdra is bulky, and behind screens it becomes a true monster, so its pretty easy to set-up and scout in the meanwhile. Eventually they will bring a Choiced thing to stop it, and thats when my other teammates enter to set-up.
DD Mence - This is the thing that usually dies first in my games, since Kingdra usually gets phazed. Mence is a total beast, pair that with DD and you got a fearsome sweeper. Best thing of Mence is that behind screens it will get always a DD. PS: I use Yache, so have fun trying to revenge me with Mamo, Weavile or Scarfape.
SD Luke - Stall breaker, defeats every single member in stall, barring the always annoying Gyarados, but its cool because most stall teams rely on Gyarados to phaze Mence, so by hurting it, Lucario has a sweep.
SD Scizor - This thing rapes Bulky offensive teams. As said before, Kingdra lures in Scarf Heatran and all those friends, which usually get sacked. Scizor shines in the way that it can KO so many things, it usually destroys stall as well. Scizor + Lucario are walled by basically the same, so they couple excellently.
Agiligross - Try to revenge me with Heatran or Starmie or company, youll get a nasty surprise when this thing gets an Agility and sweeps your ass. Main killer of very offensive teams, or in other cases, opposite HO teams. This also can get some kills in stall, since it puts quite a dent in Rotom. (MM does around 35% or something).
Did you make it to top 50 on shoddy with a HO team? (off topic question but I was just wondering xD)
Yes! It took a while, but after practicing a lot, it managed to get #1 in suspect and top 15 in OU. [/brag]
Just my 2 cents.