try to settle the matter amicably with your wife involving elders/relatives/friends etc and go for Mutual Consent Divorce which will be decided in 6-18 months, and you both will be free to live life with your wish,
contest the divorce case on merits and try to take her to a lesser amount,
yours is a good case as you are leaving outside INDIA and paying for her expenses,
“amount of MAINTENANCE/ALIMONY depends on various factors such as Living Standard, Financial Status, Properties held, assets, responsibilities, custody of children, expenses, etc, therefore, without going through deeply with facts its really unfair to tell a near to exact amount. a detailed personal discussion will enable me to answer this promptly"
engage a counsel who can negotiate for a lesser amount on your behalf