A fitting way to see torn-t leave the tier :]
Anyway one of the largest threats to this team is Swords Dance Toxicroak, especially with a jolly nature. Tentacruel is complete set up bait, and a smart player can try to lure tenta in for a double switch to croak to boost up. Jirachi has a 80%'ish chance to be OHKO'd by Life Orb Cross Chop after rocks, so the only switch in is really politoed who can't do anything back besides p song croak out, which is only delaying it. Playing well will usually not allow croak to set up so it is managable if you stay wary of it throughout the match and execute a late game torn-t before the opponent can find a chance to boost croak.
Asides from that I really like the team. It shows how strong using a Defensive Core along with an offensive core to support a sweeper is. Mamoswine + Breloom can revenge plenty of the threats in OU while providing a lot of pressure, especially if breloom finds a chance to use spore. That is another strong point of this team ; not many set up sweepers are capable of breaking through 2 prio abusers along with 2 very capable walls and politoed so that the enemy will be hard pressed to break through the team given tentacruel's durability and jirachi's ability to pass wishes around to all the other team members, helping them be ready to check the opponents team members. As far as uncommon sets go, Sub + Toxic Tentacruel is fairly rare on the ladder, and is very effective under rain. Being near impossible to take down once it has gotten its substitute up, and hassling the opponent with scald to cripple physical sweepers and toxic being a great stalling weapon as usual. The set itself is pretty much rains version of SubToxic Gliscor, except more annoying with its increased durabilty, scald under rain can actually hurt stuff and rapid spin provides the team with further support. about learning stuff from the team, I can imagine Breloom + Mamoswine picking up in usage as this team shows how effective they are when used together to pick off weakened sweepers.
An overall strong team with very few exploitable holes, very usable in pretty much any match up
Not good enough mate