It'd still be pretty easy since even with a competitive team, the AI doesn't predict switch-ins or play with resistances like a human player would. They would also be subject to the post-humous switch-ins afforded to the player (switch out to the appropriate counter) and any Amie related boosts. The biggest threat would probably be Dragonite because of it's ability, but any strong ice attack 1hko's it anyways.
TL:DR dumb AI is still Dumb --- Safari: Skarmory, Ferroseed, and Excadrill. FC: 3351-4630-6995. If you add me, please PM me so I can add you back ASAP :)