I like PR's techniques for RC...have you tried using their guides?
I'm not sure a tutor will really help you on timing. Once you learn the basic strategies for timing, which should have been covered in your Veritas
course, then it's a matter of practicing.
I would get PR's Verbal Workout and the Official Guide if you don't already have them, and work on just RC questions for an hour at a time. Give yourself a time limit (if I am remembering correctly, the PR book gives you a guideline of how long to spend on each RC question), and keep plugging through until you can improve your timing.
If that doesn't work, then I'd consider a tutor. Is English your native language, btw? If not, then an English tutor would definitely help.