Natural supplements for RA

My mom is on the following supplements in addition to methotrexate and NSAIDs (Aleve).

- Nordic Naturals Ultimate Omega Liquid (1 - 2 tsp per day)

- Glucosamine with Chondroitin- 1.5 gm/day + 600mg (Enzymatic Therapy)

- MSM - 2 gm/day (Enzymatic Therapy)

- Lyprinol - 4 capsules per day (Enzymatic Therapy)

Is there anything else that is relevant to include? She has extensive knee damage in one leg and we are hoping she can regenerate cartilage and tissue repair to be able to walk with these things.  The above treatment is helping her to cope with pain and inflammation... but the existing damage is taking time to heal. Any other ideas?