My advice:
If you think an RA is not needed, follow it anyway. Generally the change to your flight path is quite small.
If there is some compelling reason not to follow it, or not to fully comply with it, do the best you can, in the correct sense. (e.g. Perf inhibitions are very approximate and wouldn't know, for example, that you are covered in ice. Maybe it asks for +1500 fpm and you can only coax +800).
Whatever you do, don't manoeuvre in the opposite sense to the RA. This is massively more dangerous than non compliance.
e.g. The lake Constance collision essentially involve 4 RA's. Only 1 was correctly complied with. 1 was correct sense, but insufficient magnitude. 2 were in the wrong sense.