Anyone know how to obtain this relic? http://www.torhead.com/item/82UJQ3J/experimental-shield-overcharger

The 4 Set Bonus for Champion Gear is "Increases damage dealt to players by 5% when guarding another player." Obviously Champion Gear is pvp gear, but does this bonus apply to pve mobs as well, or is that bonus useless in pve? Thanks for any help!

My luck is nowhere to be found when opening Champion bags, but I now have enough to buy a piece of Centurion set bonus armor (39 tokens). My question is, which piece of gear is hardest to obtain in the HM Flashpoints? For example, if legs are easy to get in BT because it's an easy HM, then I don't want to spend my hard earned tokens on a Centurion leg piece. (And I already have the Champion Headgear, so if headgear is the answer, then what's the next hardest gear to get.) Thanks for any help!

Regarding the [Weekly] quest to complete 3 Hard Mode flashpoints, do they have to be different, or can I run 3 Black Talon HM to complete the quest. Thanks!