I think you can increase 500 points but not sure if you can do so in 2 months. I mean it is easier to increase from 1100 to 1600 than from 1600 to 2100. Just try to understand the test and you will be fine. Writing is easy if you learn the 20 mistakes that are there. CR is just to read a lot and have a strong vocab. For Math, I will say if you can get the PWNTHESAT math, that will help you a lot.