Cornell and many of the T15s don’t work in traditional ways to negotiate scholarships.
If you’re putting the offers against them, they will not try to exceed or match it just coz you have one. (It works in some cases sure but not in majority)
If u need help I’m happy to but I’ve said this on other chats too, you should use the different forms of leverage you have in negotiations to it’s fullest while acknowledging that you have zero power in this negotiation. The leverage is merely a mode of influence
Tip- M7s and T15s/Ivys are very comfortable in their own skin. So, putting another offer against them especially ones that can’t make them insecure enough, will not result in much. They’ll just do the bare minimum
Also, you can negotiate again!
It’s not a one off thing but you need credible new developments.