Thanks for your question! 10 hours a day is
plenty -- maybe even too much! You don't want to burn yourself out.
In studying for the LSAT, you should prioritize quality study time over the number of hours. Start by determining your areas of weakness, then focus your time on improving those weaknesses.
Start by taking a practice test and input the answers in the PowerScore portal. You will get a detailed score report noting what types of questions you did well / poorly on. If you find that you're having trouble with parallel flaws and conditional reasoning, put some time into that. Dive into the Bibles to master any concepts that you don't have down cold, particularly for Logical Reasoning. If games are your weakness, allow yourself to work through some games without time pressure to really master inference-making and setups. The Games Bible is a great resource for improving your technique and inference-spotting abilities.
Another common area of weakness is time management. If you find that you're rushing towards the end of a section, work on pacing yourself throughout the section. On average, you will have 1 minute and 20 seconds per question. Write down some benchmarks to hit during a section (e.g., at question 10, aim to be at the 14 minute mark or earlier).
Take practice tests regularly throughout your prep to gauge your progress. Ideally you should practice taking 5-section tests under timed conditions at least once a week (since it sounds like you have a lot of time to spend on prep). Outside of that, take individual sections under timed conditions then spend time reviewing them. Although reviewing tests isn't as interesting as taking them, it's critical to spend time reviewing each test you take to thoroughly understand why you got each question wrong. It's ok to make mistakes -- just try to be sure you won't make the same mistake twice!
Finally, keep in mind that the LSAT is a means to an end. In your downtime, research which law schools you would like to go to and figure out score is necessary to give you a good shot at admission / merit scholarships / etc. While scoring a 180 would be a huge accomplishment, you can still get into any law school in the country without a 180. Just as an example, the median student admitted to Yale law school this year had an LSAT score of 173.
Keep up the good work, stay focused, and keep working hard -- just not TOO hard.
Your brain needs breaks to perform at its best!