ACT V. SAT?

I’ve taken the ACT twice so I am well-adjusted to the test and do well with the timing. I got a 26 the first time and a 28 the second time but I would really like to break the 20’s and get a solid 30. Considering a 28 to a 30 means getting 2-3 more questions right in the 4 categories, should I stick the studying for the ACT? My argument for the SAT is that I am terrible at geometry and do average on the science section, both of which are not on the SAT. I have taken a practice reading and English test and scored a 660 but I am waiting for the actual SAT this Saturday to see how well I do on the math section in the actual setting. Since it takes a while to receive scores, I wanted to get different opinions on whether I should focus on the ACT geometry and science or on the SAT algebra and reading? I’m generally a straightforward person hence scoring in the 30’s for English and reading, but, again, I am HORRIBLY bad at geometry. Generally, the first score is the worst so I was wondering if I should focus on the ACT since my next improvement should be a 29-30 or should I focus on the SAT and take it in November and December again in addition to this Saturday?