face pulls. i think... that is what face-pulls are for. scapular push-ups, too.
i have the same problem with rows. with chins / pull-ups / lat pull-downs, too.
trying to superset my warm-ups with face-pulls to help me activate the right things.
i think it is helping... but time will tell.
P.S., don't be afraid to lower the weight as low as you need to in order to be able to get focused activation. once you have the activation your strength will quickly progress.