If SLC is your dream school (it was our D1's second choice) and you don't care about comparing financial aid offers, go ahead and apply ED2. If you apply for FA and are accepted, they'll make you an offer by Feb. 15, and you have two weeks to decide if you want to accept it (i.e., was it enough to allow attendance). If not, you
decline and apply RD elsewhere. Your FA is determined by your need (calculated by the school), not whether you apply ED or RD.