[Sweet Jesus]

I remember fighting this team after modifications, and although I won in the end, I remember being pretty scared of how strong it looked in team preview.

I'd add resttalk regice to your threats section since he was the one who helped me beat you for a good reason. Your two physical attackers are very frail and can be hard to switch in on Regice. His bolt beam coverage on his high special attack also wrecks everything but Camerupt who still dies pretty fast to Stab Ice Beam. I'm too lazy to read the whole history of changes and everyone's comments, but knowing Dell and FLCL, I'm sure the major changes have been covered. To help with your regice problems, I'd suggest replacing Lava plume with Fire blast since you already have enough status inducers, alomomola already blocks nearly every physcial threat and Camerupt isn't stayig on those momo doesn't anyway. Fire Blast is still a 3HKO on max hp Regice but it's better than 4 and will add much more pressure on it, easily bringing him to rest range to then let you roar him out and reset sleep turns.

You could also consider rocky helmet on amoonguss since opposing cinccinos getting a free switch are nearly sure to get a kill and amoonguss already recovers in many ways. However, lefties are still better in most situations.

EDIT: oh well apparently, Regice is boss enough to 2HKO camerupt (and outspeeds him) so you can't treathen a 3HKO though I would still put fire blast over lava plume, because if regi comes in on rocks and tanks a fireblast, he probably ain't coming back to haunt your defensive core (and he could be the dedicated counter because it's a very popular core).