The most suitable way of dealing crunch time during testing is Prioritising the test cases
We need to decide which functionalities should be tested rigorously first and which can be finished by a quick review.
Factors to be considered while priortising:
1. Impact of the functionality on the buisness.
2. Complexity of test cases.
3. The probability of defects in the particular functional area. (this can be decided by previous experience ).
4. Dependability of another test cases on it.