Do excessive discharges and gases, which necessitate repeated ablution, cause one to miss prayer, and lose devoutness, invalidate ablution, and does a small amount of discharge nullify ablution?

Discharges from a woman's private parts are pure but invalidate ablution (Wudu'). If the discharge has a known time when it stops, she should perform Wudu' and pray during that time. If the discharge is continuous, or its stopping time is not regular, then her ruling is that of a person with incontinence (Sahib al-Sals); she should perform Wudu' for prayer after its time has begun and pray with that Wudu' as much as she wishes until the time for that prayer exits. What comes out of her does not harm her, and the same applies to gases.