SR weapons 4, SR Grails 5, R Grails 3 but technically 4 if you want to waste your time.
Though, for SR weapons, you're literally gaining one R per upgrade past SR2. Whether or not that's worth your time is up to you.I like how you say "for at least 1 year" and then use an Awakening that happens in six months. And seeing as we can only see one year into the future, that means that you can at best say "for at least six months"