Hey, nice team. SD Toxicroak is a huge threat, OHKOing Gliscor with +2 Ice Punch, while the rest of your team can't do anything to it (aside from phazing) due to Toxicroak's immunity to Toxic and Water-type attacks. Bronzong could use Earthuake, but Toxicroak's +2 Cross Chop is a clean 2HKO. To help with this, you could use Psychic on Politoed over Toxic. Toxicroak loves setting up on defensive Politoed as they'll think you only have Scald, at which point you can hit it with Psychic. Toxic won't really be missed as you have it on 3 other members in addition to Toxic Spikes.
CM Reuniclus and SubCM will also give this team some major problems. Bronzong is a decent switch into Reuniclus, but it can't do much in return with an un-STABed Earthquake. Ferrothorn can take any hit from SubCM Jirachi, but it will eventually fall to the parafusion hax as Ferro can't break Rachi's subs. I suggest using Perish Song over Protect on Politoed. This change helps with the two afformentioned threats, while also giving you some insurance aganist Baton Pass teams. Using Bulldoze on Ferrothorn would also help against SubCM Jirachi as Ferro can now break its subs while taking any hit from it.
Sacing Politoed to Perish Song CM Reuniclus isnt ideal, so you could go with an unorthodox option of Calm Mind over Toxic on Bronzong with a Bold nature. Calm Mind allows Bronzong to stall-out Reuniclus's Focus Blast and with a neutral nature, Zong can outspeed Reuniclus to soften the blow (Zong doesn't need -Spe without Gyro Ball). Keep in mind that Bronzong won't be able stall out all of Reuniclus's Focus Blasts, so you'll have to play around it a bit. Calm Mind does however, allow Bronzong to stall Reuniclus until Politoed's Perish Song takes it out. Losing Protect on two mons might lead to issues regarding recovery, so I recommend using Wish on Vaporeon over Rest. Wish still allows Vaporeon to wall threats, but it can also be used to heal the rest of your team (all of which lack reliable recovery).
Hope this helps!