So rain is definetively a hard archetype, in so many ways rain teams are incredibly similar and in general not very good (looking at you politoed) however I came together and managed to build this team.
Unfortunately politoed is mandatory and neccessary for the team because it provides drizzle, as we all know it is a huge momentum sink so I opted for a perish trap set without the trapping part, its job isnt really to take down targets but to force switches with accumulating damage of toxic and well perish song, since we gonna be wasting turns by doing absolutely nothing with toad damp rock is neccessary, finally scald is there so we can do damage and rest so our rain setter can live a little longer. (also sleeping politoed still acn do the job of setting rain)
Rain abuser numero 1, when you think of rain abusers kabutops and azumarill are the first two to come to mind however beartic over here is a hidden gem, it is incredibly strong, surprisingly fast under rain and unlike the other two water types it doesnt invite the two bulky grasses that are absolutely everywhere because it has stab icicle crash, also aqua jet for RK purposes make it not completely useless out of the rain.
Rain abuser numero 2, I decided to slap the standard rain seismitoad to give an electric immunity, SR setter and special attacking swift swimmer, basically a really good role compressor.
Here is where the more unorthodox part of the team comes to shine, I decided to add the offensive core of indeedee-f and alolan raichu to form a solid psychic spam that many teams are not prepared for, raichu's 110 speed is solid so electric terrain isnt really needed and thunder in rain is incredi. I am using indeede female since the team is incredibly offensive and healing wish support is needed in case the rain sweepers get weakened, also the power drop isnt significant enough to need its male counterpart
As for the last member i needed something a bit bulkier to help me easily sponge hits also I was incredibly worried since kyurem is known as the rain destroyer, bulky scizor fit right in bringing a kyurem counter and a general pivot with its u-turn easing the pressure and helping the big hitters come in, while its bullet punch might not synergise very well with the psychic terrain most of the times scizor is clicking u-turn and roost and sciz can still hit key targets like tapu bulu with its bullet punches.
In general the team is incredibly offensive hoping to take many fast KO's, trading mon by mon to open path for powerful cleaners like scizor and indeedee.