I echo intparent’s sentiments. Quantity over Quality does not and will not get you into any top tier schools. It’s the depth and breadth of your ECs that will get you noticed, as long as you know how to leverage them. If you list 25 ECs without addressing any of them in your essays, what good are your 25 ECs?
If you “lack” ECs, admissions officers look for other compensating factors. The other factors? Your GPA, and ultimately, you essays. The essays are unbelievably important since this is where you show the admissions officer who you are. However, the essays are usually the weakest part of the application - either cliched, or vanilla.