Decided to publish my results to encourage discussion. I got 12th in the world, and 3rd in the US. Funny thing, the people who were above me was Demeantoid ( GG man ) who was second, and zonextreme on Showdown who got first. Breakdown:
Ampharos: One word finally!!! I remember getting this Ampharos as a Mareep from a wonder trade in Y, yet never got a chance to use it. This changes it entirely!!! Seriously though, Dragon Pulse and Thunderbolt are standard, while Focus Blast provides the best coverage, although in this meta game the 2 only targets are Porygon2 and Tyranitar, who are too bulky to break pass wth STAB options.
Pheromosa: I love Z-Focus Blast Phermosa! The ability to OHKO Mega-Metagross and Mawile is sooo nice. I ran timid to get the jump on M-Lop, who could outspeed you otherwise. The only problem was relying on an inaccurate Focus Blast was done. Also I made a mistake when soft-resetting on IVs, changing it to 93.8% of a OHKO.
Porygon2: The Premier TR setter. Nothing really too special, I ran Foul Play over Tbolt to help punish Snorlax who want to set up Belly Drums against Porygon2.
Nihilego: As I was testing, I had bad matchup against the likes of Pheromosa and Buzzwole, so what's the best answer? Ally Switch Nihilego!.. Okay maybe not, but still Ally Switch was really rewarding when played correctly, but requires prediction in order to be successful. I also wanted a fast room setter and an answer to Tapus, so Nihilego filled that niche perfectly, as well as being a hard answer to Volcarona and Charizard-Y.
Tapu Bulu: The glue that holds the team together. With high base power STABs and terrain control, Bulu is an impressive threat. I went with Superpower over Stone Edge is because I wanted accurate fighting type coverage.
Entei: I had to Speed run my Silver to get this Entei, in like 3 days. Regardless, it was worth it. I had been testing Incineroar, but I found it was too vulnerable too damage from Flare Blitz to keep it around. With the Assault Vest, Entei is really bulky, and served as a great Sun answer alongside Nihilego.
Videos: I can upload 10, I just learned, so I may will delete some to show off better fights.
Against a 1743 rated player had a mono-fairy team. Entei put in a lot of work.: EG5W-WWWW-WWWD-BDPK
The power of Z-Focus Blast!: 8R9G-WWWW-WWWD-BDPW
Things would have been different if I got that burn... I wonder if Ice Beam was Better at last match?: CYPW-WWWW-WWWD-BDZ9
The power of Entei: JZPG-WWWW-WWWD-BDNT
Vs Zonextreme. This match was pretty cool because we had played each other on Showdown, so we knew each other's teams: 8VZG-WWWW-WWWD-BDNY
The power of Ampharos: SLDG-WWWW-WWWD-BDNY Didn't expect follow me Blastoise though.