Just make it a passive for Level 1-84, it's pretty lame to see Awakened skills character with glowing +++ weapons & armor, 1 shotting everyone doing the new Tarti quests.
Just disable the Teleport system when Rep. is negative & PK count is more than 10, if you're gonna go on a massive PK spree do it OLD SCHOOL, disable Mentee summon & Summoner summon skills too, allow only Item based summon & escape for chaotic characters.
PKing should have consequences when it becomes blatantly abusive & griefing, PKing characters higher levels than you or less than 5 levels lower = no penalty, PKing characters 5 to 10 levels lower than you = 1hr debuff level +1 after each 5 PKs (if the debuff hasn't worn off). The greater the level difference the more the debuff increases after each 5 PKs.