Is there a term for this type of Party?

[The Roger]

Focusing on the same monster/group of monsters is a more efficient killing method than being single killing single monsters, also if everyone taps each monster the exp bonus is higher than being alone and getting only the 80% exp from the monster you just killed alone (but you get 80% exp too from the other monsters killed by other members spread on the map)

(or it seems so)

((thats my impression and numbers could be totally wrong as i didnt base on any numerical certainty nor calculations))