Well, Battle *is* the most pk-oriented cabal. Interviews and entries depend on a pk, cabal area is designed with pk in mind, selection of leaders is based partly on pk ability, powers are for pk-related purposes. If you want your name on the pillar, pk usually is a major factor.

But to be part of (any) cabal, the point is not so much being good at pk, as getting involved in cabal affairs. I used to reward the 'ok rp, super pk' characters, but if they wanted more than that baseline reward, rp is the biggest factor at the end of the day. I wouldn't punish a Berserker for trying hard. I would kick one out for ganging, and would kick anyone out for frequently hunting non-magi.

Note: This is my pov as a dead imm, unrelated to those of current Battle imms. :)