Some prominent college counseling lists suggest that Oberlin superscores the SAT, but not the ACT. Their site suggests that they don't don't treat the SAT and ACT differently, but is vague:
"We do require standardized test scores, from either the SAT or the ACT with writing, and we will consider your best score for each subsection if you take the test more than once."
So.. they don't look at the composite? They recalculate it? They do look at the composite?
Same list suggests that Colorado College superscores the ACT, but their website says they don't. Maybe the new flexible testing option could be used to effectively superscore the ACT, or at least 3 sections of it?