Thank you! Two more questions: Koko or Eleki for screen support? And what are some sweepers that heavily benefit from screens?
Tapu Koko and Regieleki are both great options, tho Regieleki does not have the problem of getting outsped by most Choice Scarf users like Landorus-Therian, whereas Tapu Koko still have to fear that. Both have the great benefits of using a pivot move, Tapu Koko uses U-turn (which doesnt get blocked by Grounds) and Regieleki can use Volt Switch. However Regieleki has Rapid Spin to remove opposing entry hazards, which benefits your own team a lot.
It really depends, as both have their up- and downsides on dual screen based teams.
Sweepers which benefit from both are as example Swords Dance Rillaboom, Swords Dance Scale Shot Garchomp, Quiver Dance Volcarona, Dragon Dance Drapault, Bulk Up Zeraora, Hawlucha with Grassy Seed in case you run Rillaboom, they benefit heavily from each other, Nasty Plot Hydreigon can be an option and also Nasty Plot Tornadus-T.