Try being preemptive most pk's rely on you being over aggresive so they can dodge and punish you as long as you pay attention to their movement you should be able to get a swing in on them, most of their attacks involve a lunge of some sort so they are commited to the movement , other than that make them come to you keep a eye out to counter GB and parry for a GB and hit them with a light unless your on pc than you can probably go for a side heavy