1) poltea doesnt fit this team, it needs support via hazards, screens, and other teammates to apply pressure but you lack those, esp with a spinner such as great tusk it cant always do that I would replace it with a bulky skeledrige, as this gives you a sp. def wall to take on attacks as your team has nul special walls vs smth such as iron valiant, hydreigon, volcarona, iron moth, etc.
2) No water resist meaning this team gets wave crashed to the beach which is uh a struggle, rotom-w should be the next member of the team as it can pivot your teammates in, slow a team down with t-wave, and gives you a ground immunity that you lack
3) Hp + def investment will be much better on great tusk, it makes it overall much bulkier and gives you a much more reliable physical wall. Knock > ice spinner to remove items for ur team, it is very important of getting rid of something such as leftovers on great tusk to make late game cleaning with kingambit easier. Stealth rock > Body press gives you a rocker as your team lacks one
4) offensive cinderace -> court change. This gives you a backup removal option and a bulky cinderace allows you to have a pivot that can bring in specs pult, iron valiant, or kingambit. You also have a volt turn core with rotom-w which can be very helpful at wearing down opponents esp with knock + hazards wearing them down even further
https://pokepast.es/5c5fe97765eed626 this is what i was going for, I hope you like the team
