What PTs should I use to Continue Studying?

Hi all,

Since I've already done the more recent PTs which better reflect what I'll see on test day (PT 153 to PT 159), is there much benefit in taking older tests? I feel that the more recent tests are harder, so I'm not sure if my performance on an older test will accurately reflect my future score 😞.

For reference, I'm taking the LSAT in October and need advice, thank you!