It is difficult to judge based on only one simulation test. Obviously the best possible option would be to learn at least the most basic rules concerning SC.

To be honest, I think there is quite a large gap between a score of 22-26 and 30-34. So in my opinion you would be really lucky if you succeeded.

If I were you, I would work on all three parts of the verbal section. In case of SC, if you are not willing to spend long hours repeating the whole set of rules, you can track only the questions where you choose the incorrect answer and then repeat only the rules concerning this question.