So i've been noticing in most marauder guides (or any gameplay videos for that matter) that not many marauders use retaliation. This ability doesn't share the GCD with your other abilities and is a great asset when you are building rage and your other abilities are on cooldown. Even for carnage, massacre has the small window where you cannot use the ability, so use retaliation in that small time-slot. This should increase your dps by a sizeable amount, if anybody notices any flaws in this, please let me know.