I can only say that I have not heard Stevens to be generous with merit scholarships but a bit better with need based aid. Also heard since U Mass Amherst is a state school and COA is lower they do not give much money either.
If you are a not a California resident then UC Irvine will be full pay at $65K/year to attend and their merit aid (scholarships) are few and not likely. ACT composite score within range but depending upon intended major, it could be on the low side. The largest merit award at UCI is the Regents scholarship at $2500 a year.
If you are a CA resident, your stats are within range but not likely to garner merit scholarships but if eligible, need based aid such as Cal Grants and Blue and Gold opportunity aid would be available.
Have you run the Net Price Calculators for all schools to see their cost estimates?
I’m not sure how some of these schools are safeties as you can’t be instate for more than one. If you are out of state, generally the state flagships are not great for merit scholarships.