What should we do?

What to do immune mediated meningitis/ splenic mass/ high liver enzymes

My 9 year old female American Bulldog started trembling and not eating 2 weeks ago. She had a MRI/spinal tap and was diagnosed with immune mediated meningitis. She is on prednisone and cyclosporine to treat. She also has a uti and is on clavamox. She seemed better but also showed the expected symptoms of the medications (weight loss, increased thirst, increased hunger, lethargy). We took her back to the vet and they collected blood and urine for labs. The results showed high liver enzymes for all categories Alt 428, Alk Phosphatase 2583, GGT 108, and PrecisionPSL 435. The vet is concerned but wants to talk to neurology before making any changes.

What should we do? What could be the issue? How can we keep her healthy and happy for as long as possible? Any thoughts would be greatly appreciated.