Rawr is an object of religious fervor, though it's calculated max dps may not be reasonable, depending on which module it is. Feral spec for example assumes 100% uptime on all bleeds and debuffs (no startup time) and assumes that all combo points not used for maintaining savage roar and rip are used for 5 point ferocious bites, which isn't achievable in even practice dummy cases. I don't know how accurate the elemental module is, but beware that Rawr does have limitations, historically trinket proc handling is also a weakness.
Though if you're getting reasonable close to what rawr says you should be (make sure the selected buffs and talents match actual) then you're doing well, then start using Rawr and other resources to target upgrades. Hell, even bringing in another buff (like the LW-based gift of the wild buff) can be a substantial boost.
