This looks to be a promising article from the title. I haven't had time to read but might be worth discussing. Without reading further I am not sure what to think about the "exercising our rational capabilities" comment (especially since this was presented in an Aristotle group) but I do like even at first glance the "establishing control over our lives."
Epicurus on Pleasure, a Complete Life, and Death: A Defence
Epicurus argued that the good life is the pleasurable life. He also argued that 'death is nothing to us'. These claims appear in tension. For if…
www.academia.edu
If this is worthwhile we'll add it to the "files" section.
NOTE: I have now read it all, and I have presented lots of criticisms of it below, but it is a very good article for focusing on the issues involved in viewing Epicurus' goal as "Tranquility."