It would have been helpful if you had kept to the
same thread
You are still talking about applying for FLR(M) however as explained previously your wife can't apply for FLR(M) from outside the UK. Can you clarify has your wife already left the UK, if not when does she plan on doing so and for how long?
I think there is a risk your application will be refused if you are overdrawn by such a large amount each month, on the otherhand you do have a significant combined income and indeed your wife is already established in the UK. If the application were refused on maintenance grounds from within the UK there is a high chance that they would grant her further leave outside the rules instead.
Applying from Pakistan creates an additional risk of refusal, and could result in your wife being stuck there (if they decide to curtail her existing visa).
You have said your wife qualifies for ILR under the 10 year rule, so if she didn't travel to Pakistan this would probably be the better option. Why does she need to travel urgently (if she has not already done so) and can she put off the trip?