Godek I am not sure it is even a valid idea to list them by importance without defining your criteria for what is important. Since there is no Fate there is no single set of challenges that everyone will face in any set order. No doubt you could list "virtues" in order of number of times that they are referenced, or you could look for references to things which are stressed such as "prudence" in Cicero's "On Ends."
As I think of that reference, that might qualify as your "most important" but aside from a few references like that I am not aware of any list.
Of your list, I would question whether "moderation" is valid to include, or a virtue at all in Epicurean terms, since moderation itself is understandable only in relation to other ambigous terms (too much, too little, but is it not outside factors that determine all three?)