With the recent announcement of the July LSAT now being Flex, is there a more accurate way to score PT's?

Hello!

I've been studying for the LSAT for quite some time now. I took a course last summer and am still having trouble with sufficient assumption questions. I know the videos say that these are freebies once understood but I have yet to get there! Does anyone have any tips? I've done so many problem sets of solely SA questions along with watching the videos but when it comes to trying them myself I seem to get stuck.