By now you would have understood that maint is unavoidable.
And you wife is askiing huge amount for divorce otherwise NOT (is it on paper anywhere? Probably it is a backdoor negotiations ...right!)
Has wife claimed any couter relief in her WS? (e.g. divorce/RCR/JS vide sec 23-A as counter relief to respondent , Or RCR as a counterrelief or judicial separation?..... From her say/WS has she made counter allegations of cruelty/desertion committed by you?)
It depends on it also to some extent.............but one thing is clear that 'one can't take advantage of one's own wrongs'.
It's well known that husbands have to put up a very strong case to win divorce.
You need to elaborate your case and the incidence of factum of separation. Then it may be easy to tell.