Alright so I am not going to be that active in Smog and mons until the end of the school year (which is less than a week from now). For the meantime, I just would drop a team for the meantime.
This team revolves around a cool offense core of Mega Houndoom/Landorus-T/Milotic. The main premise of the core is to support either Landorus-T or Mega Houndoom along with Milotic to pressure opposing teams. Milotic is essential for the core, which prevents Fire types and opposing Landorus-T from breaking apart the 2 Pokemon by STAB water moves and Competitive respectively. Milotic benefits from both Houndoom and Landorus-T through breaking grasses and using Imprison to lock away any enemy Lando's spread options. The next few Pokemon came soon enough. Jirachi acts as the first fairy resist and provides Sunny Day to potentially stop Rain and boost up Houndoom's attacks. Terrakion is here to help with the sun match-up, given the fact that you don't have a Scarf Lando. Finally, Goggles Aegislash as a 2nd fairy check and spread blocker, as well as a needed Trick Room check.
This team actually has a few weaknesses, and you'd face most of these quite occasionally, such as a combination of Mega Manectric and Keldeo and, potentially, Bisharp. Anyway, this team is really good to use, but it's definitely not for a beginner to start with.
Note: If you fight a team with a bulky water using this team, I guess you should rather click x or go balls.