Yep, any brand from the vitamin aisle at the store, you can pull down on her wattle or mix it into a treat. Sour crop can be treated with yeast infection cream at the worst.
That should help, I prefer direct dosing with 400i.u vitamin E capsule and about a third of a B complex tablet every day for a few weeks. It can take a few weeks to recover from deficiency as long as they get enough.
Scaley mites won't heal over night, it will take a few weeks to kill all generations of mites and heal the Scales.
Vet rx is useless for mites, the Vaseline or any oil is good. Make sure to rub it in.
The oregano oil is not necessary for this.