You know, people are always going on about my traps, and I swear to you, I never do shit for them. I dead alot, and I do full range-of-motion clean and presses. I honestly think that's all you need. Your traps will be fine, and the extra mass from dead and cleans will be awesome all over. I think shrugs are a waste of time, I mean they work, but deads just as good for traps and many other benefits.