Didn’t know that about the ACT & Sutton- thanks for the info. So, studystudystudy for the ACT. The key to the ACT is speed (for example, in many cases reading the whole question is not necessary)- look up ACT study hints.
If you are for-real interested in Dickinson I would reach out to them for confirmation about the language requirement for international students. For one thing, they might be flexible (though you would certainly have to take a foreign language if you attended D, but pretty much necessary in most IR programs anyway). For another, Dickinson is a school that notes ‘interest’ from applicants, and is a school whee some amount of interaction could be helpful.