Firstly engage an experienced divorce lawyer to defend the petition of RCR or Divorce as the case may be.
Secondly RCR is the petition for seeing resumption of conjugal relationship that husband seek the wife to do as she has withdrawn from his company, so best defense in this case is to appear in the court and inform the Family Court that she is ready to live with him if she is given due respect and care that as wife she deserves and which is not being provided by the husband at the matrimonial home.
Such defense will fail the RCR petition and the husband's intention for divorce in future will get defeated on the first step itself.
As far divorce by husband using any of the ground as available are concerned those too will get defeated if the case is conducted properly in the Family Court.
The wife must demand her right of maintenance and residence from the husband as that will bind him to be financially bound by court order on both these accounts; this will further deter his effort to get divorce from the wife.