How much do subject tests (that are required by the school) weigh into the admission process?
Does the ACT score matter much more? as in enough to outweigh poor/average subject test scores?
It will depend by school (and possibly panel looking at the record). That’s why it’s called an holistic review.
For competitive schools, the ACT/SAT1 scores percentiles are usually higher than the SAT2 score percentile.