What works best for people who are on Biologics or have depressed immune system?

I am on Enbrel for my RA. I have had fat injections done on the back of my hands by a very good surgeon, but did not last more than a couple of months! I have also had Radiesse injected which did not last at all. I was told because of being on Enbrel they did not last and was recommended dermal fillers such as Restylane Lyft or Juvederm instead. How true is this?