Literature is usually very competitive, only about the first percentile get 800s if that’s what you’re aiming for. Here’s an approximate curve list from 2011: http://talk.collegeconfidential.com/sat-subject-tests-preparation/1171357-sat-2-curves.html
If you’re looking for an 800, then Math II will probably be the closest–Bio M and Lit usually doesn’t give much leeway with their curves.