Victini and Kyurem-B are far too strong in this meta atm.
Fusion bolt + Fusion flare become very strong together and you either have a STAB base power 200 move that is more powerful than V create (especially powerful in sun) or you have a non-STAB fusion bolt coming of 170 base attack with 200 power.
Its so overwhelming and... difficult to counter, it's basically helping hand without your partner sitting useless and a lot of the pokemon that can absorb a fusion flare won't like the fusion bolt.
It doesn't help that Victini increases the accuracy of both of their moves by 10%.. they have 130 BP moves..
I think I started this strategy and yes it is pretty overpowered. It is exceptional at just OHKOing anything. I didn't even put any thought into the rest of my team and I got to the mid 1800s just on the backs of Kyurem-B and Victini firing off Fusion attacks. The rest of the team has very little synergy and is just full of Pokemon I wanted to use. I'm sure if someone sat down and put a better supporting cast around those two they would get to the top of the ladder really quickly. I really only like playing this meta because of the ability to use things like Victini (which I think is one of the best mons in this tier, nothing likes taking base 180 or 200 attacks and also makes things like Rock Slide and Draco Meteor more reliable).
I'm also not going to tell you guys how to run this tier but
Fish's post still continues to ring true, there is a whole world out there that doesn't care about about a meta created by a fan site,
nearly 7.5 million to be exact. Doubles is also not something new, it has been the defacto metagame since 2006 (JAA) and has had tons of support not only from the creators but the players themselves. There is a difference from Smogon support and a worldwide official support. I get Smogon wants control over what you guys play, but keep things in perspective.
On the topic of exploring doubles, we sort of laugh at the discovery of strategies that we once used ages ago. Things like Zapdos+Garchomp, Whimsicott+Terrakion, etc all nice and all but they are severely limiting. Thinking in pairs like that hasn't been done in VGC in a long time and why I urge players here to explore VGC and Nugget Bridge you will find a lot of tools and resources that would help you excel here. Instead of thinking in pairs think of your whole team as a cohesive unit, you guys are in a unique situation where you can use all 6 Pokemon, don't limit your strategies and ideas to 3 pairs of Pokemon or even just 6 Pokemon that follow the same idea. I've been laddering considerably and I noticed either people have a team of 6 Trick Room Pokemon (6 Rain Pokemon, 6 Sun Pokemon, etc) and can't succeed if they don't get Trick Room going or just the pair idea where if you don't have your two Pokemon out at the same time you crumble. The best players have been those that adapt to the situation in front of them not just blindly execute a strategy.
Some of us may be trolling (Fusion team is really bad beyond Victini/Kyurem) but the lack of really good teams that take advantage of all 6 Pokemon have let us just climb the ladder very quickly with our VGC inspired teams. So I really urge you guys to actually visit and read and even post on Nugget Bridge, I'm not meaning to advertise but you will gain a lot of understanding of doubles. We have gone through a lot of the trials and tribulations that you guys have already, bring yourselves up to speed to succeed in your own metagame.