It’s an arts school. The bulk of their merit aid will be based on the strength of YOUR portfolio in comparison to the other applicants when you apply. Typically the largest awards go to those with the top application strength…and at RISD, that would include your portfolio.
Tuition alone is about $47,000…which would be a HUGE award from that school.
Apply and see…but also have other options in case the money is not forthcoming.
ETA…if you KNOW they rarely give this amount of money…what makes you think you will be able to get it?