Best time strategy ?

Different strategies work for different people so there is nothing called the "best strategy". Here is some input that might help you:
In Quant, you have about 2 mins per question and the time spent on reading the question is usually about 10-15 secs.
In Verbal, you have about 1.5 mins per question and the time spend on reading the question is usually more than 30 secs.

The point is that you want to minimise wastage of time (to bank maximum time for rest of the questions) if you are going to guess/skip a question but still want to good probability of getting it correct.
So in Quant, if you do read the question and take an educated guess, you could still do it in about 30 secs (banking the rest of the 1.5 mins) and increase your probability of getting it correct to about 50%.
In Verbal, if you do read the question and take an educated guess, it could take as much as 45 sec to a min hence leaving you with just 30 secs to bank. It does increase the probability of getting the answer correct but doesn't add much value to the time bank. You might as well put in another 30 secs and give it your best shot!
Hence the strategy you mentioned.

I would suggest you to check out the CR question stem if nothing else and if the question is in your comfort zone, go ahead and invest in it. Else, you can decide to skip it. Ideally you should spend 1 min in SC questions so skipping them doesn't add too much value in any case until and unless the statement is long and convoluted.