1,2,4) Despite what you might have read, diet, lysine, and hormonal contraception have no known effects on herpes recurrence frequency or severity. Most likely the inhaled steroid also has no effect either. However, some of the steroid is deposited in the mouth, and conceivably could impair your immune response to HSV. But to my knowledge this has never been studied and I cannot give a firm answer.
3) Daily suppression is effective against recurrent oral herpes. HSV-1 is less susceptible than HSV-2, so that oral herpes typically requires higher doses of drug than genital herpes. Valacyclovir 1.0 g twice daily or acyclovir 800 mg 3 times daily are often used to start, but the dose can then be reduced to see if a lower amount keeps outbreaks in check. But follow your provider's advice for details.
Regards- HHH, MD