<p>Aureonae pretty much summed it up (and she’s right, you’re guaranteed admission to at least 1 of the campuses).</p>
<p>What I recommend you do is write down your ECs/Awards that you’ve received over your high school career so far and organize them in order of importance to you. You’ll have to do that for college apps, and it will also give you a good idea of whether or not you need to enhance them.
Achieving a 2000 or more on the SAT and 680+ on all the SAT Subject Tests you decide to take would improve your chances, but it probably wouldn’t really change which UCs are reaches, matches, safeties, etc.</p>