https://forums.d2jsp.org/topic.php?t=56809861&f=87&o=0If you are on d2r, the section regarding WSM bugging isn’t relevant because that was patched on d2r.
But yes, the difference between -20 and -30 is notable for trap speed frames and the associated IAS needed to get to max frame rate.
Hint, you need more than 10 additional ias if your awsm = -20 to reach max trap speed as compared to the amount of additional ias you need to reach max trap speed if your awsm = - 30