Pain can oneshot them all with CST, CT or Gedo Mazo if he wanted to.
Even without those attacks he still wins. None of the team can detect the chameleon, which means Animal Path can spam summons on Sasori and Kisame. Either Deidara or Kisame can be taken out easily with Bansho Tenin + chakra rods to the skull/Soul Rip, whereas all of team 1's jutsus can be dodged,blocked with summons or absorbed. Kisame is not likely to use his dome unless he wants to drown his partners, Deidara can't use C3, C4 or C0 off the bat if he wants to risk killing his partners as well, whereas Sasori's attacks mean nothing to Asura Path's missiles and laser, and boss toad level Shinra Tenseis from Deva Path.
Pain kills Deidara before he realises he needs his bigger techniques, wipes out Sasori and his puppet arsenal, and finishes off Kisame with CST or CT if he tries to use the dome.