You won't get one.
Clim and Increase Climb RAs have performance based inhibitions.
There is always the possibility that a demanded RA can not be met (perhaps an engine just failed or you are covered in ice), so ultimately the pilot must protect the flight envelope of the aircraft.
Nevertheless, all aircraft should be inhibited at the top of their envelope.
If you should get a climb RA that you can not achieve, for whatever reason, do the best that you can, even if this means just flying level rather than descending.
See other TCAS threads to differentiate between the concept of being permitted to disregard an RA, versus the concept of a manoeuvre opposite.
CPB