if you have a focus sash you can try putting it on vileplum to paralyze her noivern and then it will be pretty easy to deal with, you can also try getting aquajet on clawizter just for now by talking to the move reminder on the bottom right corner of agate circus. Aquajet will destroy her archeops (if you were getting one hit before you can get a surf off, but aqua jet could definatley come in handy), save flygon for talonflame and save delphox for her mega atria. If you need to i can give you my magnazone and rotom to help you
you can also catch a pilloswine with ice shard (priority) and one hit noivern