For most schools, you don't have to take SAT IIs if you take the ACTs. That was what ShawD did.
ShawSon took both SATs and ACTs but needed a third SAT II for some Ivy. [He's seriously gifted but severely dyslexic]. He looked at and started to study for the History exam and then decided it was too much reading. He switched instead to the Literature exam because you didn't have to remember stuff, just interpret passages. And, he felt, he could intuit the kind of responses they wanted. He did remarkably well given the dyslexia.
See if you just do the ACTs and if not, check out literature or something in math/science.