The Decimator Set is the first RvR set that you can obtain in Warhammer Online, and it has been the downfall of many an industrious or completionist player. The first set piece is fairly easy to find, as the boots drop off of felled enemy players in ORvR or scenarios. They are also Bind on Equip, so it may be possible to find them on the auction house, if not for particularly cheap. The chestpiece, however, is almost impossible to find, even for dedicated players or groups. These pieces only drop from the sergeants that guard the battlefield objectives in the various Tier 1 RvR lakes. These sergeants are rank 10 champions and are difficult, but not terribly so.
These drop rates, however, are extremely low, and you may do nothing but try your hand at BOs from level 1 to level 11 and not see more than a couple drop. Because of the speed at which you level in tier 1, it is inadvisable to try to complete this set, especially considering the superior items you will receive in tier 2. Still, if you are already doing ORvR there is no harm in trying, and you may well get lucky. This set requires rank 8 and 9 and renown rank 7 and 8 for the boots and chestpiece respectively. Acquiring both pieces will grant you the title 'The Decimator', 66 xp, and a tome unlock. The two piece set bonus will grant you +14 to your primary stat.