I can’t believe you’re actually complaining about having to do something once on one character.
You do it once like others have said and then it’s account wide. After that you can do the PvP quests from Malicia that require you to do battlegrounds, solo shuffle, or arena. You’ll get one splinter a week and you need two for a Spark of Shadowflame to craft PvP 450 gear. Easy, the rest you buy on the auction house and you put in a work order.
The horrors of doing a tiny bit of PvE in a game that’s PvX! 