9 seconds is a long time on close enrage timers in savage, most first kills happen during the final enrage cast, if the game was not so tight on dps it indeed would not matter, but it is not a choice, you must go maximum dps and the game doesnt show you this informations.
If it doesnt matter why dont you make all tanks meld Tenacity and all healers meld full Piety? right because you MUST go full dps.