Divorce under Hindu law is divided into two types:
Mutual Divorce: Under the Hindu Marriage Act, divorce by consent is governed by Section 13-B. As the name suggests, in an amicable divorce, both parties, i.e. husband and wife, agree on a peaceful separation and give their consent. The husband and wife must settle the issues regarding maintenance and custody of the children, if any, in advance. There are only two requirements for filing for a divorce by mutual consent: Firstly, both parties must agree and secondly, they must have lived separately for at least one year
Contested divorce: If the divorce is initiated by either of the spouses, it is called a contested divorce. Section 13 of the Hindu Marriage Act, 1955, lists the grounds for filing a contested divorce, including cruelty, change of religion, insanity, communicable diseases or that one of the spouses has not been seen for more than seven years.
You can apply for divorce under the grounds of:
1. Adultery.
2. Desertion.
3. Insanity.
4. Conversion.
5. Renunciation.
6. Cruelty.
7. Venereal disease.
8. Presumption of death.
9. Sodomy,
10. Bestiality,
11. Bigamy,
12. Conviction for an offense of moral turpitude such as Rape
As you said, your wife is a menace and has tried to harm your parents then it won’t be a good idea to keep both of them together. And as you said, you want to handle this matter legally then you should file for a divorce. It won’t be a problem if you both will file for mutual divorce, as she also wants a divorce. Indeed, you can try to talk to her before filing a petition for divorce and try to resolve this problem. But if you don’t come to a conclusion then, unfortunately, you have to file for a divorce.