If you feel that RC is your weak subject currently, you should focus on it for the next few days and try to do 3-4 passages a day. When solving a question, focus on learning the method and not on timing. Leave the last 7 days before the exam to do tests and focus on timing.

Hmm... I wonder if you shouldn't be even more strategic about this.

If RC is your worst section, why not cut your losses there and focus on the sections that will provide the highest return on your investment. Not to say that you shouldn't practice RC passages between now and D-day, but instead of going for broke, it may make sense to focus on one RC area to improve on and leave it at that.

For example, you could focus on main point/purpose questions. Improve your batting average in this area -- so that by the time D-day comes around, you are 90-100% confident that you will answer those questions correct on any RC passage.

I see two benefits with this approach. 1) It will boost your confidence in RC, because you will instantly notice an improvement in one area. 2) It will give you time to focus on a Quant, SC or CR section that you are not yet 100% on.

On D-day, you will be fighting many battles, don't add one more battle by taking on too much RC at once.

Good Luck!