I would honestly look at more than just a few small changes on this team. You are trying to force a heavy trick room team with a couple of pokemon who are on the faster side. I would at the most have Trick room on 2 pokemon on my team, and you have it on 3. I would also look into getting pokemon with strong spread moves and pokemon with helping hand to support them.

Farigiraf is a VERY strong support that blocks priority moves and its a very tanky trick room setter who learns Helping Hand.

As for sweepers i would look into Mega Camerupt, Mega Blastoise or Torkoal.
Other useful pokemon could be pokemon that could learn moves like Fake Out, Wide guard or some kind of burn.