Ideally you do both. But if your line-up is a little unbalanced (some great ones, but not solid across all weights), you can have a scenario where your team will fair better in a larger field tournament like the NCAA due to more matches and larger placement points. Thus what happened for several years when comparing NCSt and VT. However, given the choice between the two...with some caveats performing better at NCAAs is probably more widely regarded than ACCT placement. This is because it is a national viewed tournament, not regional, and individual AA's and champions are coveted more.