Drk training question

So im a 131 Dark knight, and I was wondering what the most effective way of solo grinding was. I have 20 berserk, 14x ACC, and im NOT hp washed. Also i play KMS, so my damage is lower than that of a DrK in GMS. I heard training without zerk is better at lvl 13x for non hp washed Drks. idk...Would it be more effective training without zerk at skeles? newties? Gobies w/ zerk? Any suggestions would be great!