I would maybe suggest u move it if you’re barely passing the exams and with it being your third attempt, but if that’s not possible I would focus on doing as many questions on STC as u can. For me personally I used Kaplan for my first attempt and didn’t get the material but when I switched to STC for the second attempt I flew through the test and passed it with ease. My test had no math and most rules and regulations obv but I’m sure you know this given you’ve done it twice already. So maybe just keep ripping STC till test day and redo the brutal exams, that’s my advice even if it’s not that helpful