How about some titles for more than 5k kills which any veteran pvper should get 2 or more years ago. There's no any way to check the current number but I'm sure the hidden counter after 5k is still ticking.

A lot of variants here, from 'The Punisher' to 'Assassin' to 'The Face of Death' to 'Cannibal' to 'Deus Ex Machina' (which makes no sense but sounds cool anyway).