A: Not an expert by a long shot on this condition but can give some suggestions worth trying.
As for the epilepsy, Medical Marijuana, or Hemp Oil/CBD (legal & non-psychoactive) is by far the single best medicine for this condition and also has powerful whole body (central nervous, musculoskeletal, immune, glandular etc) balancing or equalizing effects. Taurine is also good for brain function.
Music or Harmonic Sound Therapy has lots of potential. Search by condition plus "isochronic" or "binaural" tones or beats. These tones will interfere with pharmaceutical meds so do address this interaction.
Epsom Salts baths as little as 1/4 cup for her 2-3 times per wk should help.
Herbs like Garlic, Oregano, Neem are good natural antibiotics. Colloidal Silver is also good natural antibiotic.
Coconut Oil is fuel for the brain and strengthens the Thyroid gland.
Aspartic Acid would be worth investigating as a natural stimulant w/ potential in increasing movement and performance. Other energy nutrients worth trying are d-Ribose and Creatine (will increase performance & ability).