I must say that it rarely happened me to be killed while grinding. When a guy came the spot where I was grinding one time and asked for a duel, I said no and kept grinding. He killed me, I didn't have healing pots and he was stronger than me but it took time for him to kill me. I came back and kept killing mobs quickly, he run after me and killed me another couple of times, I let him do it, didn't care much. After 3 times he gave up. That was even funny in a way. I usually look for small rotations that aren't so popular and I actually often share the rotation with other people in areas like Nagas where there's plenty of mobs and spots and the mobs spawn fast. Worked always well for me.