1. The charge against section 498A is non compoundable, So, your wife can not withdraw it of her own,
2. She has to give such evidence before the Court which will exonerate you.
3. You insist her for the said assurance under affidavit as suggested in my earlier post with which you can file a petition for quashing the FIR filed by her wherein you can submit the said affidavit of her,
4. You should not worry about her 498A complaint since it has lost its teeth by recent supreme court order wherein it has been directed that police will not make any arrest without making any investigation,
5. You also rest assured that there will be no action against the accused against the bcomplaint for committing black magic on her.
6. Since your wife is employed, she is not entitled to any maintenance fro her husband. However, you shall have to pay maintenance for your daughter,
7. You shall have to pay maintenance for your daughter till she is married. The amount of maintenanec will depend on the Court which will be within 1/3rd to 1/5th of your monthly income.